diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b545636..6eb34183 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- added: SimpleSwap centralized swap integration
+
 ## 2.53.0 (2026-08-18)
 
 - added: Swapter swap provider
diff --git a/scripts/allSynchronizers.ts b/scripts/allSynchronizers.ts
index 4d30e944..876c0bd6 100644
--- a/scripts/allSynchronizers.ts
+++ b/scripts/allSynchronizers.ts
@@ -16,6 +16,7 @@ import { makeLifiSynchronizer } from './synchronizers/lifi/lifiSynchronizer'
 import { makeMayaProtocolSynchronizer } from './synchronizers/mayaprotocol/mayaprotocolSynchronizer'
 import { makeRangoSynchronizer } from './synchronizers/rango/rangoSynchronizer'
 import { makeSideShiftSynchronizer } from './synchronizers/sideshift/sideshiftSynchronizer'
+import { makeSimpleSwapSynchronizer } from './synchronizers/simpleswap/simpleswapSynchronizer'
 import { makeSwapKitSynchronizer } from './synchronizers/swapkit/swapkitSynchronizer'
 import { makeSwapuzSynchronizer } from './synchronizers/swapuz/swapuzSynchronizer'
 import { makeThorchainSynchronizer } from './synchronizers/thorchain/thorchainSynchronizer'
@@ -32,6 +33,7 @@ export const synchronizers: SwapSynchronizer[] = [
   makeMayaProtocolSynchronizer(config),
   makeRangoSynchronizer(config),
   makeSideShiftSynchronizer(config),
+  makeSimpleSwapSynchronizer(config),
   makeSwapKitSynchronizer(config),
   makeSwapuzSynchronizer(config),
   makeThorchainSynchronizer(config),
diff --git a/scripts/mapctlConfig.ts b/scripts/mapctlConfig.ts
index fdf0716b..740622ff 100644
--- a/scripts/mapctlConfig.ts
+++ b/scripts/mapctlConfig.ts
@@ -8,6 +8,7 @@ const asMapctlConfig = asObject({
   EXOLIX_API_KEY: asOptional(asString, ''),
   LETSEXCHANGE_API_KEY: asOptional(asString, ''),
   RANGO_API_KEY: asOptional(asString, ''),
+  SIMPLESWAP_API_KEY: asOptional(asString, ''),
   SWAPUZ_API_KEY: asOptional(asString, ''),
   SWAPKIT_API_KEY: asOptional(asString, ''),
   XGRAM_API_KEY: asOptional(asString, '')
diff --git a/scripts/mappings/simpleswapMappings.ts b/scripts/mappings/simpleswapMappings.ts
new file mode 100644
index 00000000..65de3661
--- /dev/null
+++ b/scripts/mappings/simpleswapMappings.ts
@@ -0,0 +1,1622 @@
+import { EdgeCurrencyPluginId } from '../../src/util/edgeCurrencyPluginIds'
+
+export const simpleswap = new Map<string, EdgeCurrencyPluginId | null>()
+// Currency Count: 1
+// Display Name: 0g
+simpleswap.set('0g', null)
+
+// Currency Count: 2
+// Display Name: ab
+simpleswap.set('ab', null)
+
+// Currency Count: 1
+// Display Name: abbc
+simpleswap.set('abbc', null)
+
+// Currency Count: 1
+// Display Name: aca
+simpleswap.set('aca', null)
+
+// Currency Count: 1
+// Display Name: act
+simpleswap.set('act', null)
+
+// Currency Count: 6
+// Display Name: ada
+simpleswap.set('ada', 'cardano')
+
+// Currency Count: 1
+// Display Name: adi
+simpleswap.set('adi', null)
+
+// Currency Count: 1
+// Display Name: ae
+simpleswap.set('ae', null)
+
+// Currency Count: 1
+// Display Name: aed
+simpleswap.set('aed', null)
+
+// Currency Count: 1
+// Display Name: ai3
+simpleswap.set('ai3', null)
+
+// Currency Count: 1
+// Display Name: aix
+simpleswap.set('aix', null)
+
+// Currency Count: 1
+// Display Name: akt
+simpleswap.set('akt', null)
+
+// Currency Count: 1
+// Display Name: aleo
+simpleswap.set('aleo', null)
+
+// Currency Count: 4
+// Display Name: algo
+simpleswap.set('algo', 'algorand')
+
+// Currency Count: 1
+// Display Name: algousdt
+simpleswap.set('algousdt', null)
+
+// Currency Count: 1
+// Display Name: allora
+simpleswap.set('allora', null)
+
+// Currency Count: 1
+// Display Name: alph
+simpleswap.set('alph', null)
+
+// Currency Count: 1
+// Display Name: amb
+simpleswap.set('amb', null)
+
+// Currency Count: 1
+// Display Name: amd
+simpleswap.set('amd', null)
+
+// Currency Count: 1
+// Display Name: analog
+simpleswap.set('analog', null)
+
+// Currency Count: 1
+// Display Name: ao
+simpleswap.set('ao', null)
+
+// Currency Count: 13
+// Display Name: apt
+simpleswap.set('apt', null)
+
+// Currency Count: 1
+// Display Name: aptos
+simpleswap.set('aptos', null)
+
+// Currency Count: 1
+// Display Name: ar
+simpleswap.set('ar', null)
+
+// Currency Count: 3
+// Display Name: arbevm
+simpleswap.set('arbevm', null)
+
+// Currency Count: 82
+// Display Name: arbitrum
+simpleswap.set('arbitrum', 'arbitrum')
+
+// Currency Count: 2
+// Display Name: arbnova
+simpleswap.set('arbnova', null)
+
+// Currency Count: 1
+// Display Name: arch
+simpleswap.set('arch', null)
+
+// Currency Count: 1
+// Display Name: ardr
+simpleswap.set('ardr', null)
+
+// Currency Count: 1
+// Display Name: ark
+simpleswap.set('ark', null)
+
+// Currency Count: 1
+// Display Name: arrr
+simpleswap.set('arrr', 'piratechain')
+
+// Currency Count: 1
+// Display Name: ars
+simpleswap.set('ars', null)
+
+// Currency Count: 1
+// Display Name: astr
+simpleswap.set('astr', null)
+
+// Currency Count: 1
+// Display Name: atom
+simpleswap.set('atom', 'cosmoshub')
+
+// Currency Count: 1
+// Display Name: aud
+simpleswap.set('aud', null)
+
+// Currency Count: 1
+// Display Name: auran
+simpleswap.set('auran', null)
+
+// Currency Count: 1
+// Display Name: avail
+simpleswap.set('avail', null)
+
+// Currency Count: 1
+// Display Name: avax
+simpleswap.set('avax', null)
+
+// Currency Count: 27
+// Display Name: avaxc
+simpleswap.set('avaxc', 'avalanche')
+
+// Currency Count: 1
+// Display Name: azero
+simpleswap.set('azero', null)
+
+// Currency Count: 1
+// Display Name: baby
+simpleswap.set('baby', null)
+
+// Currency Count: 1
+// Display Name: baju
+simpleswap.set('baju', null)
+
+// Currency Count: 1
+// Display Name: band
+simpleswap.set('band', null)
+
+// Currency Count: 120
+// Display Name: base
+simpleswap.set('base', 'base')
+
+// Currency Count: 1
+// Display Name: baseevm
+simpleswap.set('baseevm', null)
+
+// Currency Count: 1
+// Display Name: bb
+simpleswap.set('bb', null)
+
+// Currency Count: 1
+// Display Name: bch
+simpleswap.set('bch', 'bitcoincash')
+
+// Currency Count: 1
+// Display Name: bdx
+simpleswap.set('bdx', null)
+
+// Currency Count: 1
+// Display Name: beam
+simpleswap.set('beam', null)
+
+// Currency Count: 4
+// Display Name: bera
+simpleswap.set('bera', null)
+
+// Currency Count: 1
+// Display Name: bfc
+simpleswap.set('bfc', null)
+
+// Currency Count: 1
+// Display Name: bgn
+simpleswap.set('bgn', null)
+
+// Currency Count: 2
+// Display Name: blast
+simpleswap.set('blast', null)
+
+// Currency Count: 1
+// Display Name: bld
+simpleswap.set('bld', null)
+
+// Currency Count: 1
+// Display Name: blocx
+simpleswap.set('blocx', null)
+
+// Currency Count: 1
+// Display Name: brise
+simpleswap.set('brise', null)
+
+// Currency Count: 1
+// Display Name: brl
+simpleswap.set('brl', null)
+
+// Currency Count: 797
+// Display Name: bsc
+simpleswap.set('bsc', 'binancesmartchain')
+
+// Currency Count: 1
+// Display Name: bsv
+simpleswap.set('bsv', 'bitcoinsv')
+
+// Currency Count: 37
+// Display Name: btc
+simpleswap.set('btc', 'bitcoin')
+
+// Currency Count: 1
+// Display Name: btg
+simpleswap.set('btg', 'bitcoingold')
+
+// Currency Count: 1
+// Display Name: bts
+simpleswap.set('bts', null)
+
+// Currency Count: 1
+// Display Name: cad
+simpleswap.set('cad', null)
+
+// Currency Count: 1
+// Display Name: canto
+simpleswap.set('canto', null)
+
+// Currency Count: 1
+// Display Name: canton
+simpleswap.set('canton', null)
+
+// Currency Count: 1
+// Display Name: ccd
+simpleswap.set('ccd', null)
+
+// Currency Count: 4
+// Display Name: celo
+simpleswap.set('celo', 'celo')
+
+// Currency Count: 1
+// Display Name: cfx
+simpleswap.set('cfx', null)
+
+// Currency Count: 1
+// Display Name: cfxcore
+simpleswap.set('cfxcore', null)
+
+// Currency Count: 1
+// Display Name: chf
+simpleswap.set('chf', null)
+
+// Currency Count: 1
+// Display Name: chromia
+simpleswap.set('chromia', null)
+
+// Currency Count: 10
+// Display Name: chz2
+simpleswap.set('chz2', null)
+
+// Currency Count: 1
+// Display Name: citrea
+simpleswap.set('citrea', null)
+
+// Currency Count: 1
+// Display Name: ckb
+simpleswap.set('ckb', null)
+
+// Currency Count: 1
+// Display Name: cmt
+simpleswap.set('cmt', null)
+
+// Currency Count: 1
+// Display Name: cop
+simpleswap.set('cop', null)
+
+// Currency Count: 1
+// Display Name: core
+simpleswap.set('core', null)
+
+// Currency Count: 1
+// Display Name: coreum
+simpleswap.set('coreum', 'coreum')
+
+// Currency Count: 1
+// Display Name: corn
+simpleswap.set('corn', null)
+
+// Currency Count: 1
+// Display Name: coti
+simpleswap.set('coti', null)
+
+// Currency Count: 3
+// Display Name: cro
+simpleswap.set('cro', null)
+
+// Currency Count: 1
+// Display Name: croevm
+simpleswap.set('croevm', null)
+
+// Currency Count: 2
+// Display Name: cronos
+simpleswap.set('cronos', null)
+
+// Currency Count: 1
+// Display Name: cspr
+simpleswap.set('cspr', null)
+
+// Currency Count: 1
+// Display Name: ctk
+simpleswap.set('ctk', null)
+
+// Currency Count: 1
+// Display Name: ctxc
+simpleswap.set('ctxc', null)
+
+// Currency Count: 1
+// Display Name: cyber
+simpleswap.set('cyber', null)
+
+// Currency Count: 1
+// Display Name: czk
+simpleswap.set('czk', null)
+
+// Currency Count: 1
+// Display Name: dag
+simpleswap.set('dag', null)
+
+// Currency Count: 1
+// Display Name: dash
+simpleswap.set('dash', 'dash')
+
+// Currency Count: 1
+// Display Name: dcr
+simpleswap.set('dcr', null)
+
+// Currency Count: 1
+// Display Name: deso
+simpleswap.set('deso', null)
+
+// Currency Count: 1
+// Display Name: dfi
+simpleswap.set('dfi', null)
+
+// Currency Count: 1
+// Display Name: dgb
+simpleswap.set('dgb', 'digibyte')
+
+// Currency Count: 1
+// Display Name: dione
+simpleswap.set('dione', null)
+
+// Currency Count: 1
+// Display Name: divi
+simpleswap.set('divi', null)
+
+// Currency Count: 1
+// Display Name: dkk
+simpleswap.set('dkk', null)
+
+// Currency Count: 2
+// Display Name: doge
+simpleswap.set('doge', 'dogecoin')
+
+// Currency Count: 1
+// Display Name: dogechain
+simpleswap.set('dogechain', null)
+
+// Currency Count: 1
+// Display Name: dop
+simpleswap.set('dop', null)
+
+// Currency Count: 1
+// Display Name: dora
+simpleswap.set('dora', null)
+
+// Currency Count: 2
+// Display Name: dvpn
+simpleswap.set('dvpn', null)
+
+// Currency Count: 1
+// Display Name: dydx
+simpleswap.set('dydx', null)
+
+// Currency Count: 1
+// Display Name: dym
+simpleswap.set('dym', null)
+
+// Currency Count: 4
+// Display Name: egld
+simpleswap.set('egld', null)
+
+// Currency Count: 1
+// Display Name: ela
+simpleswap.set('ela', null)
+
+// Currency Count: 1
+// Display Name: endurance
+simpleswap.set('endurance', null)
+
+// Currency Count: 1
+// Display Name: enj
+simpleswap.set('enj', null)
+
+// Currency Count: 1
+// Display Name: eos
+simpleswap.set('eos', 'eos')
+
+// Currency Count: 1
+// Display Name: erg
+simpleswap.set('erg', null)
+
+// Currency Count: 1
+// Display Name: es
+simpleswap.set('es', null)
+
+// Currency Count: 1
+// Display Name: etc
+simpleswap.set('etc', 'ethereumclassic')
+
+// Currency Count: 997
+// Display Name: eth
+simpleswap.set('eth', 'ethereum')
+
+// Currency Count: 1
+// Display Name: etherlink
+simpleswap.set('etherlink', null)
+
+// Currency Count: 1
+// Display Name: ethw
+simpleswap.set('ethw', 'ethereumpow')
+
+// Currency Count: 1
+// Display Name: etn
+simpleswap.set('etn', null)
+
+// Currency Count: 1
+// Display Name: eur
+simpleswap.set('eur', null)
+
+// Currency Count: 1
+// Display Name: evmos
+simpleswap.set('evmos', null)
+
+// Currency Count: 1
+// Display Name: ewt
+simpleswap.set('ewt', null)
+
+// Currency Count: 1
+// Display Name: exp
+simpleswap.set('exp', null)
+
+// Currency Count: 2
+// Display Name: fantom
+simpleswap.set('fantom', 'fantom')
+
+// Currency Count: 1
+// Display Name: fb
+simpleswap.set('fb', null)
+
+// Currency Count: 1
+// Display Name: fet
+simpleswap.set('fet', null)
+
+// Currency Count: 1
+// Display Name: fil
+simpleswap.set('fil', 'filecoin')
+
+// Currency Count: 1
+// Display Name: filevm
+simpleswap.set('filevm', 'filecoinfevm')
+
+// Currency Count: 1
+// Display Name: fio
+simpleswap.set('fio', 'fio')
+
+// Currency Count: 1
+// Display Name: firo
+simpleswap.set('firo', 'zcoin')
+
+// Currency Count: 2
+// Display Name: fitfi
+simpleswap.set('fitfi', null)
+
+// Currency Count: 1
+// Display Name: flow
+simpleswap.set('flow', null)
+
+// Currency Count: 2
+// Display Name: flr
+simpleswap.set('flr', null)
+
+// Currency Count: 1
+// Display Name: fluent
+simpleswap.set('fluent', null)
+
+// Currency Count: 1
+// Display Name: flux
+simpleswap.set('flux', null)
+
+// Currency Count: 1
+// Display Name: fogo
+simpleswap.set('fogo', null)
+
+// Currency Count: 1
+// Display Name: fra
+simpleswap.set('fra', null)
+
+// Currency Count: 1
+// Display Name: fraevm
+simpleswap.set('fraevm', null)
+
+// Currency Count: 1
+// Display Name: frax
+simpleswap.set('frax', null)
+
+// Currency Count: 1
+// Display Name: fsn
+simpleswap.set('fsn', null)
+
+// Currency Count: 1
+// Display Name: ftn
+simpleswap.set('ftn', null)
+
+// Currency Count: 1
+// Display Name: gas
+simpleswap.set('gas', null)
+
+// Currency Count: 1
+// Display Name: gbp
+simpleswap.set('gbp', null)
+
+// Currency Count: 1
+// Display Name: gensyn
+simpleswap.set('gensyn', null)
+
+// Currency Count: 1
+// Display Name: ghs
+simpleswap.set('ghs', null)
+
+// Currency Count: 2
+// Display Name: glmr
+simpleswap.set('glmr', null)
+
+// Currency Count: 1
+// Display Name: glq
+simpleswap.set('glq', null)
+
+// Currency Count: 1
+// Display Name: gmmt
+simpleswap.set('gmmt', null)
+
+// Currency Count: 1
+// Display Name: gravity
+simpleswap.set('gravity', null)
+
+// Currency Count: 1
+// Display Name: grs
+simpleswap.set('grs', 'groestlcoin')
+
+// Currency Count: 1
+// Display Name: gt
+simpleswap.set('gt', null)
+
+// Currency Count: 1
+// Display Name: gtevm
+simpleswap.set('gtevm', null)
+
+// Currency Count: 1
+// Display Name: gun
+simpleswap.set('gun', null)
+
+// Currency Count: 1
+// Display Name: haqq
+simpleswap.set('haqq', null)
+
+// Currency Count: 5
+// Display Name: hbar
+simpleswap.set('hbar', 'hedera')
+
+// Currency Count: 5
+// Display Name: heco
+simpleswap.set('heco', null)
+
+// Currency Count: 1
+// Display Name: hemi
+simpleswap.set('hemi', null)
+
+// Currency Count: 1
+// Display Name: hive
+simpleswap.set('hive', null)
+
+// Currency Count: 1
+// Display Name: hkd
+simpleswap.set('hkd', null)
+
+// Currency Count: 1
+// Display Name: hmnd
+simpleswap.set('hmnd', null)
+
+// Currency Count: 1
+// Display Name: hpp
+simpleswap.set('hpp', null)
+
+// Currency Count: 1
+// Display Name: hsk
+simpleswap.set('hsk', null)
+
+// Currency Count: 1
+// Display Name: htr
+simpleswap.set('htr', null)
+
+// Currency Count: 1
+// Display Name: huf
+simpleswap.set('huf', null)
+
+// Currency Count: 1
+// Display Name: hype
+simpleswap.set('hype', null)
+
+// Currency Count: 2
+// Display Name: hyperevm
+simpleswap.set('hyperevm', 'hyperevm')
+
+// Currency Count: 1
+// Display Name: icp
+simpleswap.set('icp', null)
+
+// Currency Count: 1
+// Display Name: icx
+simpleswap.set('icx', null)
+
+// Currency Count: 1
+// Display Name: ils
+simpleswap.set('ils', null)
+
+// Currency Count: 1
+// Display Name: init
+simpleswap.set('init', null)
+
+// Currency Count: 1
+// Display Name: inj
+simpleswap.set('inj', null)
+
+// Currency Count: 1
+// Display Name: inr
+simpleswap.set('inr', null)
+
+// Currency Count: 1
+// Display Name: iost
+simpleswap.set('iost', null)
+
+// Currency Count: 1
+// Display Name: iota
+simpleswap.set('iota', null)
+
+// Currency Count: 1
+// Display Name: iotx
+simpleswap.set('iotx', null)
+
+// Currency Count: 1
+// Display Name: iris
+simpleswap.set('iris', null)
+
+// Currency Count: 1
+// Display Name: iron
+simpleswap.set('iron', null)
+
+// Currency Count: 1
+// Display Name: isk
+simpleswap.set('isk', null)
+
+// Currency Count: 1
+// Display Name: jod
+simpleswap.set('jod', null)
+
+// Currency Count: 1
+// Display Name: joystream
+simpleswap.set('joystream', null)
+
+// Currency Count: 1
+// Display Name: jpy
+simpleswap.set('jpy', null)
+
+// Currency Count: 1
+// Display Name: kai
+simpleswap.set('kai', null)
+
+// Currency Count: 3
+// Display Name: kaia
+simpleswap.set('kaia', null)
+
+// Currency Count: 1
+// Display Name: kar
+simpleswap.set('kar', null)
+
+// Currency Count: 1
+// Display Name: kas
+simpleswap.set('kas', null)
+
+// Currency Count: 1
+// Display Name: katana
+simpleswap.set('katana', null)
+
+// Currency Count: 2
+// Display Name: kava
+simpleswap.set('kava', null)
+
+// Currency Count: 3
+// Display Name: kavaevm
+simpleswap.set('kavaevm', null)
+
+// Currency Count: 10
+// Display Name: kcc
+simpleswap.set('kcc', null)
+
+// Currency Count: 1
+// Display Name: kda
+simpleswap.set('kda', null)
+
+// Currency Count: 6
+// Display Name: klay
+simpleswap.set('klay', null)
+
+// Currency Count: 1
+// Display Name: klv
+simpleswap.set('klv', null)
+
+// Currency Count: 1
+// Display Name: kma
+simpleswap.set('kma', null)
+
+// Currency Count: 1
+// Display Name: kmd
+simpleswap.set('kmd', null)
+
+// Currency Count: 1
+// Display Name: konet
+simpleswap.set('konet', null)
+
+// Currency Count: 1
+// Display Name: krw
+simpleswap.set('krw', null)
+
+// Currency Count: 1
+// Display Name: ksmsm
+simpleswap.set('ksmsm', null)
+
+// Currency Count: 1
+// Display Name: kyve
+simpleswap.set('kyve', null)
+
+// Currency Count: 1
+// Display Name: kzt
+simpleswap.set('kzt', null)
+
+// Currency Count: 1
+// Display Name: lava
+simpleswap.set('lava', null)
+
+// Currency Count: 1
+// Display Name: lbc
+simpleswap.set('lbc', null)
+
+// Currency Count: 1
+// Display Name: lightning
+simpleswap.set('lightning', null)
+
+// Currency Count: 4
+// Display Name: linea
+simpleswap.set('linea', null)
+
+// Currency Count: 3
+// Display Name: lineaeth
+simpleswap.set('lineaeth', null)
+
+// Currency Count: 1
+// Display Name: lkr
+simpleswap.set('lkr', null)
+
+// Currency Count: 1
+// Display Name: ltc
+simpleswap.set('ltc', 'litecoin')
+
+// Currency Count: 1
+// Display Name: lto
+simpleswap.set('lto', null)
+
+// Currency Count: 1
+// Display Name: lukso
+simpleswap.set('lukso', null)
+
+// Currency Count: 1
+// Display Name: lumia
+simpleswap.set('lumia', null)
+
+// Currency Count: 1
+// Display Name: luna
+simpleswap.set('luna', null)
+
+// Currency Count: 3
+// Display Name: lunc
+simpleswap.set('lunc', null)
+
+// Currency Count: 3
+// Display Name: manta
+simpleswap.set('manta', null)
+
+// Currency Count: 2
+// Display Name: mantra
+simpleswap.set('mantra', null)
+
+// Currency Count: 1
+// Display Name: mapo
+simpleswap.set('mapo', null)
+
+// Currency Count: 2
+// Display Name: maro
+simpleswap.set('maro', null)
+
+// Currency Count: 1
+// Display Name: mat
+simpleswap.set('mat', null)
+
+// Currency Count: 80
+// Display Name: matic
+simpleswap.set('matic', 'polygon')
+
+// Currency Count: 1
+// Display Name: megaeth
+simpleswap.set('megaeth', null)
+
+// Currency Count: 1
+// Display Name: memecore
+simpleswap.set('memecore', null)
+
+// Currency Count: 1
+// Display Name: merlin
+simpleswap.set('merlin', null)
+
+// Currency Count: 2
+// Display Name: metis
+simpleswap.set('metis', null)
+
+// Currency Count: 1
+// Display Name: mezo
+simpleswap.set('mezo', null)
+
+// Currency Count: 1
+// Display Name: milk
+simpleswap.set('milk', null)
+
+// Currency Count: 1
+// Display Name: mina
+simpleswap.set('mina', null)
+
+// Currency Count: 1
+// Display Name: mito
+simpleswap.set('mito', null)
+
+// Currency Count: 8
+// Display Name: mnt
+simpleswap.set('mnt', null)
+
+// Currency Count: 1
+// Display Name: mob
+simpleswap.set('mob', null)
+
+// Currency Count: 2
+// Display Name: mode
+simpleswap.set('mode', null)
+
+// Currency Count: 2
+// Display Name: monad
+simpleswap.set('monad', 'monad')
+
+// Currency Count: 1
+// Display Name: movr
+simpleswap.set('movr', null)
+
+// Currency Count: 1
+// Display Name: mtl
+simpleswap.set('mtl', null)
+
+// Currency Count: 1
+// Display Name: mvrk
+simpleswap.set('mvrk', null)
+
+// Currency Count: 1
+// Display Name: mxc
+simpleswap.set('mxc', null)
+
+// Currency Count: 1
+// Display Name: mxn
+simpleswap.set('mxn', null)
+
+// Currency Count: 1
+// Display Name: nac
+simpleswap.set('nac', null)
+
+// Currency Count: 1
+// Display Name: nano
+simpleswap.set('nano', null)
+
+// Currency Count: 1
+// Display Name: nbs
+simpleswap.set('nbs', null)
+
+// Currency Count: 7
+// Display Name: near
+simpleswap.set('near', null)
+
+// Currency Count: 1
+// Display Name: neer
+simpleswap.set('neer', null)
+
+// Currency Count: 2
+// Display Name: neo
+simpleswap.set('neo', null)
+
+// Currency Count: 3
+// Display Name: neo3
+simpleswap.set('neo3', null)
+
+// Currency Count: 1
+// Display Name: neon
+simpleswap.set('neon', null)
+
+// Currency Count: 1
+// Display Name: nibi
+simpleswap.set('nibi', null)
+
+// Currency Count: 1
+// Display Name: nil
+simpleswap.set('nil', null)
+
+// Currency Count: 1
+// Display Name: nimpos
+simpleswap.set('nimpos', null)
+
+// Currency Count: 1
+// Display Name: noble
+simpleswap.set('noble', null)
+
+// Currency Count: 1
+// Display Name: nok
+simpleswap.set('nok', null)
+
+// Currency Count: 1
+// Display Name: nom
+simpleswap.set('nom', null)
+
+// Currency Count: 1
+// Display Name: ntrn
+simpleswap.set('ntrn', null)
+
+// Currency Count: 1
+// Display Name: nuls
+simpleswap.set('nuls', null)
+
+// Currency Count: 1
+// Display Name: num
+simpleswap.set('num', null)
+
+// Currency Count: 1
+// Display Name: nzd
+simpleswap.set('nzd', null)
+
+// Currency Count: 1
+// Display Name: oas
+simpleswap.set('oas', null)
+
+// Currency Count: 2
+// Display Name: okt
+simpleswap.set('okt', null)
+
+// Currency Count: 1
+// Display Name: olt
+simpleswap.set('olt', null)
+
+// Currency Count: 1
+// Display Name: omn
+simpleswap.set('omn', null)
+
+// Currency Count: 1
+// Display Name: one
+simpleswap.set('one', null)
+
+// Currency Count: 2
+// Display Name: ong
+simpleswap.set('ong', null)
+
+// Currency Count: 2
+// Display Name: ont
+simpleswap.set('ont', null)
+
+// Currency Count: 1
+// Display Name: oort
+simpleswap.set('oort', null)
+
+// Currency Count: 3
+// Display Name: opbnb
+simpleswap.set('opbnb', 'opbnb')
+
+// Currency Count: 20
+// Display Name: optimism
+simpleswap.set('optimism', 'optimism')
+
+// Currency Count: 1
+// Display Name: orai
+simpleswap.set('orai', null)
+
+// Currency Count: 2
+// Display Name: osmo
+simpleswap.set('osmo', 'osmosis')
+
+// Currency Count: 1
+// Display Name: ozone
+simpleswap.set('ozone', null)
+
+// Currency Count: 1
+// Display Name: partisia
+simpleswap.set('partisia', null)
+
+// Currency Count: 1
+// Display Name: pdex
+simpleswap.set('pdex', null)
+
+// Currency Count: 2
+// Display Name: peaq
+simpleswap.set('peaq', null)
+
+// Currency Count: 1
+// Display Name: pen
+simpleswap.set('pen', null)
+
+// Currency Count: 1
+// Display Name: pepecoin
+simpleswap.set('pepecoin', null)
+
+// Currency Count: 1
+// Display Name: phantasma
+simpleswap.set('phantasma', null)
+
+// Currency Count: 1
+// Display Name: pharos
+simpleswap.set('pharos', null)
+
+// Currency Count: 1
+// Display Name: php
+simpleswap.set('php', null)
+
+// Currency Count: 1
+// Display Name: pi
+simpleswap.set('pi', null)
+
+// Currency Count: 1
+// Display Name: pica
+simpleswap.set('pica', null)
+
+// Currency Count: 1
+// Display Name: pivx
+simpleswap.set('pivx', 'pivx')
+
+// Currency Count: 1
+// Display Name: pix
+simpleswap.set('pix', null)
+
+// Currency Count: 2
+// Display Name: plasma
+simpleswap.set('plasma', null)
+
+// Currency Count: 1
+// Display Name: PlatON
+simpleswap.set('PlatON', null)
+
+// Currency Count: 1
+// Display Name: plcu
+simpleswap.set('plcu', null)
+
+// Currency Count: 1
+// Display Name: pln
+simpleswap.set('pln', null)
+
+// Currency Count: 1
+// Display Name: plume
+simpleswap.set('plume', null)
+
+// Currency Count: 1
+// Display Name: pokt
+simpleswap.set('pokt', null)
+
+// Currency Count: 1
+// Display Name: polyx
+simpleswap.set('polyx', null)
+
+// Currency Count: 1
+// Display Name: psl
+simpleswap.set('psl', null)
+
+// Currency Count: 1
+// Display Name: pulse
+simpleswap.set('pulse', 'pulsechain')
+
+// Currency Count: 1
+// Display Name: qar
+simpleswap.set('qar', null)
+
+// Currency Count: 1
+// Display Name: qie
+simpleswap.set('qie', null)
+
+// Currency Count: 1
+// Display Name: qtum
+simpleswap.set('qtum', 'qtum')
+
+// Currency Count: 1
+// Display Name: qubic
+simpleswap.set('qubic', null)
+
+// Currency Count: 1
+// Display Name: rbtc
+simpleswap.set('rbtc', null)
+
+// Currency Count: 1
+// Display Name: react
+simpleswap.set('react', null)
+
+// Currency Count: 1
+// Display Name: reef
+simpleswap.set('reef', null)
+
+// Currency Count: 1
+// Display Name: rei
+simpleswap.set('rei', null)
+
+// Currency Count: 1
+// Display Name: rol
+simpleswap.set('rol', null)
+
+// Currency Count: 6
+// Display Name: ron
+simpleswap.set('ron', null)
+
+// Currency Count: 1
+// Display Name: rook
+simpleswap.set('rook', null)
+
+// Currency Count: 1
+// Display Name: root
+simpleswap.set('root', null)
+
+// Currency Count: 1
+// Display Name: rootstock
+simpleswap.set('rootstock', null)
+
+// Currency Count: 1
+// Display Name: rose
+simpleswap.set('rose', null)
+
+// Currency Count: 1
+// Display Name: route
+simpleswap.set('route', null)
+
+// Currency Count: 1
+// Display Name: rune
+simpleswap.set('rune', 'thorchainrune')
+
+// Currency Count: 1
+// Display Name: rvn
+simpleswap.set('rvn', 'ravencoin')
+
+// Currency Count: 1
+// Display Name: rxd
+simpleswap.set('rxd', null)
+
+// Currency Count: 1
+// Display Name: saga
+simpleswap.set('saga', null)
+
+// Currency Count: 1
+// Display Name: sc
+simpleswap.set('sc', null)
+
+// Currency Count: 2
+// Display Name: scroll
+simpleswap.set('scroll', null)
+
+// Currency Count: 1
+// Display Name: scrt
+simpleswap.set('scrt', null)
+
+// Currency Count: 1
+// Display Name: sdn
+simpleswap.set('sdn', null)
+
+// Currency Count: 1
+// Display Name: sei
+simpleswap.set('sei', null)
+
+// Currency Count: 1
+// Display Name: seievm
+simpleswap.set('seievm', null)
+
+// Currency Count: 1
+// Display Name: sek
+simpleswap.set('sek', null)
+
+// Currency Count: 1
+// Display Name: sgb
+simpleswap.set('sgb', null)
+
+// Currency Count: 1
+// Display Name: sgd
+simpleswap.set('sgd', null)
+
+// Currency Count: 1
+// Display Name: slf
+simpleswap.set('slf', null)
+
+// Currency Count: 2
+// Display Name: smart
+simpleswap.set('smart', 'smartcash')
+
+// Currency Count: 1
+// Display Name: smartchain
+simpleswap.set('smartchain', null)
+
+// Currency Count: 1
+// Display Name: smh
+simpleswap.set('smh', null)
+
+// Currency Count: 273
+// Display Name: sol
+simpleswap.set('sol', 'solana')
+
+// Currency Count: 1
+// Display Name: sol
+simpleswap.set('sol ', null)
+
+// Currency Count: 1
+// Display Name: somnia
+simpleswap.set('somnia', null)
+
+// Currency Count: 2
+// Display Name: sonic
+simpleswap.set('sonic', 'sonic')
+
+// Currency Count: 1
+// Display Name: soph
+simpleswap.set('soph', null)
+
+// Currency Count: 1
+// Display Name: soso
+simpleswap.set('soso', null)
+
+// Currency Count: 1
+// Display Name: space
+simpleswap.set('space', null)
+
+// Currency Count: 1
+// Display Name: stable
+simpleswap.set('stable', null)
+
+// Currency Count: 3
+// Display Name: starknet
+simpleswap.set('starknet', null)
+
+// Currency Count: 4
+// Display Name: statemint
+simpleswap.set('statemint', null)
+
+// Currency Count: 2
+// Display Name: steem
+simpleswap.set('steem', null)
+
+// Currency Count: 1
+// Display Name: story
+simpleswap.set('story', null)
+
+// Currency Count: 1
+// Display Name: strax
+simpleswap.set('strax', null)
+
+// Currency Count: 1
+// Display Name: stt
+simpleswap.set('stt', null)
+
+// Currency Count: 2
+// Display Name: stx
+simpleswap.set('stx', null)
+
+// Currency Count: 34
+// Display Name: sui
+simpleswap.set('sui', 'sui')
+
+// Currency Count: 1
+// Display Name: supra
+simpleswap.set('supra', null)
+
+// Currency Count: 1
+// Display Name: sxp
+simpleswap.set('sxp', null)
+
+// Currency Count: 1
+// Display Name: sys
+simpleswap.set('sys', null)
+
+// Currency Count: 1
+// Display Name: sysevm
+simpleswap.set('sysevm', null)
+
+// Currency Count: 1
+// Display Name: tac
+simpleswap.set('tac', null)
+
+// Currency Count: 1
+// Display Name: taiko
+simpleswap.set('taiko', null)
+
+// Currency Count: 1
+// Display Name: tao
+simpleswap.set('tao', null)
+
+// Currency Count: 1
+// Display Name: tara
+simpleswap.set('tara', null)
+
+// Currency Count: 1
+// Display Name: tbc
+simpleswap.set('tbc', null)
+
+// Currency Count: 1
+// Display Name: tenet
+simpleswap.set('tenet', null)
+
+// Currency Count: 1
+// Display Name: thb
+simpleswap.set('thb', null)
+
+// Currency Count: 4
+// Display Name: theta
+simpleswap.set('theta', null)
+
+// Currency Count: 1
+// Display Name: tia
+simpleswap.set('tia', null)
+
+// Currency Count: 1
+// Display Name: tlos
+simpleswap.set('tlos', 'telos')
+
+// Currency Count: 1
+// Display Name: tlosevm
+simpleswap.set('tlosevm', null)
+
+// Currency Count: 34
+// Display Name: ton
+simpleswap.set('ton', 'ton')
+
+// Currency Count: 27
+// Display Name: trx
+simpleswap.set('trx', 'tron')
+
+// Currency Count: 1
+// Display Name: try
+simpleswap.set('try', null)
+
+// Currency Count: 1
+// Display Name: tt
+simpleswap.set('tt', null)
+
+// Currency Count: 1
+// Display Name: twd
+simpleswap.set('twd', null)
+
+// Currency Count: 1
+// Display Name: u2u
+simpleswap.set('u2u', null)
+
+// Currency Count: 1
+// Display Name: unichain
+simpleswap.set('unichain', null)
+
+// Currency Count: 1
+// Display Name: usd
+simpleswap.set('usd', null)
+
+// Currency Count: 1
+// Display Name: uyu
+simpleswap.set('uyu', null)
+
+// Currency Count: 1
+// Display Name: vana
+simpleswap.set('vana', null)
+
+// Currency Count: 1
+// Display Name: vara
+simpleswap.set('vara', null)
+
+// Currency Count: 1
+// Display Name: venom
+simpleswap.set('venom', null)
+
+// Currency Count: 3
+// Display Name: vet
+simpleswap.set('vet', null)
+
+// Currency Count: 1
+// Display Name: vic
+simpleswap.set('vic', null)
+
+// Currency Count: 1
+// Display Name: vite
+simpleswap.set('vite', null)
+
+// Currency Count: 1
+// Display Name: vlx
+simpleswap.set('vlx', null)
+
+// Currency Count: 1
+// Display Name: vnd
+simpleswap.set('vnd', null)
+
+// Currency Count: 1
+// Display Name: vsc
+simpleswap.set('vsc', null)
+
+// Currency Count: 1
+// Display Name: vsys
+simpleswap.set('vsys', null)
+
+// Currency Count: 1
+// Display Name: vts
+simpleswap.set('vts', null)
+
+// Currency Count: 1
+// Display Name: wan
+simpleswap.set('wan', null)
+
+// Currency Count: 1
+// Display Name: warden
+simpleswap.set('warden', null)
+
+// Currency Count: 1
+// Display Name: water
+simpleswap.set('water', null)
+
+// Currency Count: 2
+// Display Name: waves
+simpleswap.set('waves', null)
+
+// Currency Count: 1
+// Display Name: wax
+simpleswap.set('wax', 'wax')
+
+// Currency Count: 1
+// Display Name: waxl
+simpleswap.set('waxl', null)
+
+// Currency Count: 1
+// Display Name: wemix
+simpleswap.set('wemix', null)
+
+// Currency Count: 1
+// Display Name: wit
+simpleswap.set('wit', null)
+
+// Currency Count: 1
+// Display Name: wld
+simpleswap.set('wld', null)
+
+// Currency Count: 1
+// Display Name: xai
+simpleswap.set('xai', null)
+
+// Currency Count: 1
+// Display Name: xch
+simpleswap.set('xch', null)
+
+// Currency Count: 1
+// Display Name: xdb
+simpleswap.set('xdb', null)
+
+// Currency Count: 2
+// Display Name: xdc
+simpleswap.set('xdc', null)
+
+// Currency Count: 1
+// Display Name: xec
+simpleswap.set('xec', 'ecash')
+
+// Currency Count: 1
+// Display Name: xem
+simpleswap.set('xem', null)
+
+// Currency Count: 1
+// Display Name: xfi
+simpleswap.set('xfi', null)
+
+// Currency Count: 1
+// Display Name: xion
+simpleswap.set('xion', null)
+
+// Currency Count: 6
+// Display Name: xlm
+simpleswap.set('xlm', 'stellar')
+
+// Currency Count: 1
+// Display Name: xmr
+simpleswap.set('xmr', 'monero')
+
+// Currency Count: 1
+// Display Name: xna
+simpleswap.set('xna', null)
+
+// Currency Count: 1
+// Display Name: xpll
+simpleswap.set('xpll', null)
+
+// Currency Count: 1
+// Display Name: xpr
+simpleswap.set('xpr', null)
+
+// Currency Count: 1
+// Display Name: xprt
+simpleswap.set('xprt', null)
+
+// Currency Count: 1
+// Display Name: xrd
+simpleswap.set('xrd', null)
+
+// Currency Count: 2
+// Display Name: xrp
+simpleswap.set('xrp', 'ripple')
+
+// Currency Count: 2
+// Display Name: xtz
+simpleswap.set('xtz', 'tezos')
+
+// Currency Count: 1
+// Display Name: xvg
+simpleswap.set('xvg', null)
+
+// Currency Count: 1
+// Display Name: xym
+simpleswap.set('xym', null)
+
+// Currency Count: 1
+// Display Name: zano
+simpleswap.set('zano', 'zano')
+
+// Currency Count: 1
+// Display Name: zar
+simpleswap.set('zar', null)
+
+// Currency Count: 1
+// Display Name: zec
+simpleswap.set('zec', 'zcash')
+
+// Currency Count: 1
+// Display Name: zeta
+simpleswap.set('zeta', null)
+
+// Currency Count: 1
+// Display Name: zetaevm
+simpleswap.set('zetaevm', null)
+
+// Currency Count: 1
+// Display Name: zig
+simpleswap.set('zig', null)
+
+// Currency Count: 2
+// Display Name: zil
+simpleswap.set('zil', null)
+
+// Currency Count: 1
+// Display Name: zkl
+simpleswap.set('zkl', null)
+
+// Currency Count: 10
+// Display Name: zksera
+simpleswap.set('zksera', 'zksync')
+
+// Currency Count: 1
+// Display Name: zkverify
+simpleswap.set('zkverify', null)
+
+// Currency Count: 1
+// Display Name: zrc
+simpleswap.set('zrc', null)
diff --git a/scripts/synchronizers/simpleswap/simpleswapSynchronizer.ts b/scripts/synchronizers/simpleswap/simpleswapSynchronizer.ts
new file mode 100644
index 00000000..a399fc1a
--- /dev/null
+++ b/scripts/synchronizers/simpleswap/simpleswapSynchronizer.ts
@@ -0,0 +1,78 @@
+import fetch from 'node-fetch'
+
+import { MapctlConfig } from '../../mapctlConfig'
+import { FetchChainCodeResult, SwapSynchronizer } from '../../types'
+import { getMappingFilePath, loadMappingFile } from '../../util/loadMappingFile'
+import { asSimpleSwapCurrenciesResponse } from './simpleswapTypes'
+
+const NAME = 'simpleswap'
+
+export const makeSimpleSwapSynchronizer = (
+  config: MapctlConfig
+): SwapSynchronizer => {
+  const apiKey = config.SIMPLESWAP_API_KEY
+  if (apiKey == null || apiKey === '') {
+    throw new Error('Missing SIMPLESWAP_API_KEY in environment variables')
+  }
+
+  return {
+    name: NAME,
+    get map() {
+      return loadMappingFile(NAME)
+    },
+    mappingFilePath: getMappingFilePath(NAME),
+    fetchChainCodes: async (): Promise<FetchChainCodeResult[]> => {
+      const response = await fetch('https://api.simpleswap.io/v3/currencies', {
+        headers: {
+          'x-api-key': apiKey
+        }
+      })
+
+      if (!response.ok) {
+        throw new Error(
+          `Failed to fetch SimpleSwap currencies: ${response.statusText}`
+        )
+      }
+
+      const data = await response.json()
+      const { result: currencies } = asSimpleSwapCurrenciesResponse(data)
+
+      if (currencies.length === 0) {
+        throw new Error(
+          'SimpleSwap API returned 0 currencies. This likely indicates an API error.'
+        )
+      }
+
+      // Extract unique network values with metadata
+      const networkMap = new Map<string, { count: number }>()
+      currencies.forEach(currency => {
+        if (currency.network !== '') {
+          const existing = networkMap.get(currency.network)
+          if (existing != null) {
+            existing.count++
+          } else {
+            networkMap.set(currency.network, { count: 1 })
+          }
+        }
+      })
+
+      const results = Array.from(networkMap.entries()).map(
+        ([network, info]) => ({
+          chainCode: network,
+          metadata: {
+            'Display Name': network,
+            'Currency Count': String(info.count)
+          }
+        })
+      )
+
+      if (results.length === 0) {
+        throw new Error(
+          'SimpleSwap API returned currencies but no valid networks were extracted.'
+        )
+      }
+
+      return results
+    }
+  }
+}
diff --git a/scripts/synchronizers/simpleswap/simpleswapTypes.ts b/scripts/synchronizers/simpleswap/simpleswapTypes.ts
new file mode 100644
index 00000000..c52a3149
--- /dev/null
+++ b/scripts/synchronizers/simpleswap/simpleswapTypes.ts
@@ -0,0 +1,10 @@
+import { asArray, asObject, asString } from 'cleaners'
+
+export const asSimpleSwapCurrency = asObject({
+  ticker: asString,
+  network: asString
+})
+
+export const asSimpleSwapCurrenciesResponse = asObject({
+  result: asArray(asSimpleSwapCurrency)
+})
diff --git a/src/index.ts b/src/index.ts
index 70355588..06e1327a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -11,6 +11,7 @@ import { makeLetsExchangePlugin } from './swap/central/letsexchange'
 import { makeNexchangePlugin } from './swap/central/nexchange'
 import { makeNymPlugin } from './swap/central/nym'
 import { makeSideshiftPlugin } from './swap/central/sideshift'
+import { makeSimpleSwapPlugin } from './swap/central/simpleswap'
 import { makeSwapterPlugin } from './swap/central/swapter'
 import { makeSwapuzPlugin } from './swap/central/swapuz'
 import { makeXgramPlugin } from './swap/central/xgram'
@@ -46,6 +47,7 @@ const plugins = {
   nymswap: makeNymPlugin,
   rango: makeRangoPlugin,
   sideshift: makeSideshiftPlugin,
+  simpleswap: makeSimpleSwapPlugin,
   spookySwap: makeSpookySwapPlugin,
   swapter: makeSwapterPlugin,
   swapuz: makeSwapuzPlugin,
diff --git a/src/mappings/simpleswap.ts b/src/mappings/simpleswap.ts
new file mode 100644
index 00000000..f1560c8f
--- /dev/null
+++ b/src/mappings/simpleswap.ts
@@ -0,0 +1,101 @@
+/**
+ * ⚠️ AUTO-GENERATED FILE - DO NOT EDIT DIRECTLY ⚠️
+ *
+ * This file is automatically generated from scripts/mappings/simpleswapMappings.ts
+ * To regenerate this file, run: yarn mapctl update-mappings
+ *
+ * To edit mappings:
+ * 1. Edit scripts/mappings/simpleswapMappings.ts
+ * 2. Run: yarn mapctl update-mappings
+ *
+ * This file maps EdgeCurrencyPluginId -> synchronizer network identifier (or null)
+ */
+
+import { EdgeCurrencyPluginId } from '../util/edgeCurrencyPluginIds'
+
+export const simpleswap = new Map<EdgeCurrencyPluginId, string | null>()
+simpleswap.set('abstract', null)
+simpleswap.set('algorand', 'algo')
+simpleswap.set('amoy', null)
+simpleswap.set('arbitrum', 'arbitrum')
+simpleswap.set('avalanche', 'avaxc')
+simpleswap.set('axelar', null)
+simpleswap.set('badcoin', null)
+simpleswap.set('base', 'base')
+simpleswap.set('binance', null)
+simpleswap.set('binancesmartchain', 'bsc')
+simpleswap.set('bitcoin', 'btc')
+simpleswap.set('bitcoincash', 'bch')
+simpleswap.set('bitcoincashtestnet', null)
+simpleswap.set('bitcoingold', 'btg')
+simpleswap.set('bitcoingoldtestnet', null)
+simpleswap.set('bitcoinsv', 'bsv')
+simpleswap.set('bitcointestnet', null)
+simpleswap.set('bitcointestnet4', null)
+simpleswap.set('bobevm', null)
+simpleswap.set('botanix', null)
+simpleswap.set('calibration', null)
+simpleswap.set('cardano', 'ada')
+simpleswap.set('cardanotestnet', null)
+simpleswap.set('celo', 'celo')
+simpleswap.set('coreum', 'coreum')
+simpleswap.set('cosmoshub', 'atom')
+simpleswap.set('dash', 'dash')
+simpleswap.set('digibyte', 'dgb')
+simpleswap.set('dogecoin', 'doge')
+simpleswap.set('eboost', null)
+simpleswap.set('ecash', 'xec')
+simpleswap.set('eos', 'eos')
+simpleswap.set('ethDev', null)
+simpleswap.set('ethereum', 'eth')
+simpleswap.set('ethereumclassic', 'etc')
+simpleswap.set('ethereumpow', 'ethw')
+simpleswap.set('fantom', 'fantom')
+simpleswap.set('feathercoin', null)
+simpleswap.set('filecoin', 'fil')
+simpleswap.set('filecoinfevm', 'filevm')
+simpleswap.set('filecoinfevmcalibration', null)
+simpleswap.set('fio', 'fio')
+simpleswap.set('groestlcoin', 'grs')
+simpleswap.set('hedera', 'hbar')
+simpleswap.set('holesky', null)
+simpleswap.set('hyperevm', 'hyperevm')
+simpleswap.set('liberland', null)
+simpleswap.set('liberlandtestnet', null)
+simpleswap.set('litecoin', 'ltc')
+simpleswap.set('mayachain', null)
+simpleswap.set('monad', 'monad')
+simpleswap.set('monero', 'xmr')
+simpleswap.set('nym', null)
+simpleswap.set('opbnb', 'opbnb')
+simpleswap.set('optimism', 'optimism')
+simpleswap.set('osmosis', 'osmo')
+simpleswap.set('piratechain', 'arrr')
+simpleswap.set('pivx', 'pivx')
+simpleswap.set('polkadot', null)
+simpleswap.set('polygon', 'matic')
+simpleswap.set('pulsechain', 'pulse')
+simpleswap.set('qtum', 'qtum')
+simpleswap.set('ravencoin', 'rvn')
+simpleswap.set('ripple', 'xrp')
+simpleswap.set('rsk', null)
+simpleswap.set('sepolia', null)
+simpleswap.set('smartcash', 'smart')
+simpleswap.set('solana', 'sol')
+simpleswap.set('sonic', 'sonic')
+simpleswap.set('stellar', 'xlm')
+simpleswap.set('sui', 'sui')
+simpleswap.set('suitestnet', null)
+simpleswap.set('telos', 'tlos')
+simpleswap.set('tezos', 'xtz')
+simpleswap.set('thorchainrune', 'rune')
+simpleswap.set('thorchainrunestagenet', null)
+simpleswap.set('ton', 'ton')
+simpleswap.set('tron', 'trx')
+simpleswap.set('ufo', null)
+simpleswap.set('vertcoin', null)
+simpleswap.set('wax', 'wax')
+simpleswap.set('zano', 'zano')
+simpleswap.set('zcash', 'zec')
+simpleswap.set('zcoin', 'firo')
+simpleswap.set('zksync', 'zksera')
diff --git a/src/swap/central/simpleswap.ts b/src/swap/central/simpleswap.ts
new file mode 100644
index 00000000..22249b02
--- /dev/null
+++ b/src/swap/central/simpleswap.ts
@@ -0,0 +1,470 @@
+import { ceil, eq, floor, gt, lt } from 'biggystring'
+import { asEither, asNull, asObject, asOptional, asString } from 'cleaners'
+import {
+  EdgeCorePluginOptions,
+  EdgeFetchResponse,
+  EdgeMemo,
+  EdgeSpendInfo,
+  EdgeSwapInfo,
+  EdgeSwapPlugin,
+  EdgeSwapQuote,
+  EdgeSwapRequest,
+  SwapAboveLimitError,
+  SwapBelowLimitError,
+  SwapCurrencyError,
+  SwapPermissionError
+} from 'edge-core-js/types'
+
+import { simpleswap as simpleswapMapping } from '../../mappings/simpleswap'
+import {
+  checkInvalidTokenIds,
+  checkWhitelistedMainnetCodes,
+  CurrencyCodeTranscriptionMap,
+  CurrencyPluginIdSwapChainCodeMap,
+  ensureInFuture,
+  getCodesWithTranscription,
+  getMaxSwappable,
+  InvalidTokenIds,
+  makeSwapPluginQuote,
+  mapToRecord,
+  SwapOrder
+} from '../../util/swapHelpers'
+import {
+  convertRequest,
+  denominationToNative,
+  getAddress,
+  memoType,
+  nativeToDenomination
+} from '../../util/utils'
+import { asNumberString, EdgeSwapRequestPlugin, StringMap } from '../types'
+
+const pluginId = 'simpleswap'
+
+const swapInfo: EdgeSwapInfo = {
+  pluginId,
+  isDex: false,
+  displayName: 'SimpleSwap',
+  supportEmail: 'support@simpleswap.io'
+}
+
+const asInitOptions = asObject({
+  apiKey: asString
+})
+
+const orderUri = 'https://simpleswap.io/exchange?id='
+const uri = 'https://api.simpleswap.io/v3/'
+
+const expirationMs = 1000 * 60
+
+const INVALID_TOKEN_IDS: InvalidTokenIds = { from: {}, to: {} }
+
+const addressTypeMap: StringMap = {
+  digibyte: 'publicAddress',
+  zcash: 'transparentAddress'
+}
+
+const MAINNET_CODE_TRANSCRIPTION: CurrencyPluginIdSwapChainCodeMap = mapToRecord(
+  simpleswapMapping
+)
+
+// Edge native currencyCode -> SimpleSwap ticker, where they differ
+// (verified against the live GET /v3/currencies list)
+const CURRENCY_CODE_TRANSCRIPTION: CurrencyCodeTranscriptionMap = {
+  avalanche: { AVAX: 'avaxc' },
+  binancesmartchain: { BNB: 'bnb-bsc' },
+  monad: { MON: 'monad' },
+  smartcash: { SMART: 'smart0' },
+  telos: { TLOS: 'tlosmain' },
+  wax: { WAX: 'waxp' }
+}
+
+const asRange = asObject({
+  min: asNumberString,
+  max: asEither(asNumberString, asNull)
+})
+const asEstimate = asObject({
+  estimatedAmount: asNumberString,
+  rateId: asOptional(asString),
+  validUntil: asOptional(asString)
+})
+const asCreatedExchange = asObject({
+  id: asString,
+  addressFrom: asString,
+  // SimpleSwap sends a destination tag as a JSON number on some chains, and a
+  // tag of 0 is a real tag, so this must survive both.
+  extraIdFrom: asOptional(asEither(asNumberString, asNull)),
+  amountFrom: asNumberString,
+  amountTo: asNumberString
+})
+// Raised once an order already exists, so `getQuote` knows not to retry: the
+// other flow would abandon that order and hit the same problem again.
+const FATAL_ERROR_NAME = 'SimpleSwapFatalError'
+const makeFatalError = (message: string): Error => {
+  const error = new Error(message)
+  error.name = FATAL_ERROR_NAME
+  return error
+}
+
+const asRangeReply = asObject({ result: asRange })
+const asEstimateReply = asObject({ result: asEstimate })
+const asCreatedExchangeReply = asObject({ result: asCreatedExchange })
+
+export function makeSimpleSwapPlugin(
+  opts: EdgeCorePluginOptions
+): EdgeSwapPlugin {
+  const { io, log } = opts
+  const { fetchCors = io.fetch } = io
+  const { apiKey } = asInitOptions(opts.initOptions)
+  if (apiKey === '') {
+    throw new Error('SimpleSwap: missing apiKey in initOptions')
+  }
+
+  const headers = {
+    Accept: 'application/json',
+    'Content-Type': 'application/json',
+    'x-api-key': apiKey
+  }
+
+  const resolveNetworks = (
+    request: EdgeSwapRequestPlugin
+  ): { fromNetwork: string; toNetwork: string } => {
+    const fromNetwork =
+      MAINNET_CODE_TRANSCRIPTION[
+        request.fromWallet.currencyInfo
+          .pluginId as keyof CurrencyPluginIdSwapChainCodeMap
+      ]
+    const toNetwork =
+      MAINNET_CODE_TRANSCRIPTION[
+        request.toWallet.currencyInfo
+          .pluginId as keyof CurrencyPluginIdSwapChainCodeMap
+      ]
+    if (fromNetwork == null || toNetwork == null) {
+      throw new SwapCurrencyError(swapInfo, request)
+    }
+    return { fromNetwork, toNetwork }
+  }
+
+  const getQuoteForFlow = async (
+    request: EdgeSwapRequestPlugin,
+    fixed: boolean
+  ): Promise<SwapOrder> => {
+    const { fromWallet, toWallet, quoteFor } = request
+    const reverse = quoteFor === 'to'
+
+    const call = async (
+      method: 'GET' | 'POST',
+      route: string,
+      params: { query?: StringMap; body?: unknown }
+    ): Promise<unknown> => {
+      let response: EdgeFetchResponse
+      if (method === 'POST') {
+        response = await fetchCors(uri + route, {
+          method,
+          headers,
+          body: JSON.stringify(params.body)
+        })
+      } else {
+        const query = new URLSearchParams(params.query).toString()
+        response = await fetchCors(`${uri}${route}?${query}`, {
+          method,
+          headers
+        })
+      }
+
+      if (!response.ok) {
+        const text = await response.text()
+        log.warn(`SimpleSwap ${route} error ${response.status}: ${text}`)
+        switch (response.status) {
+          case 403:
+            throw new SwapPermissionError(swapInfo, 'noVerification')
+          // 422 = out of range, but limits are enforced by the /ranges check
+          // before estimate/create, so treat it as an unavailable pair here
+          case 404:
+          case 422:
+            throw new SwapCurrencyError(swapInfo, request)
+          default:
+            throw new Error(`SimpleSwap returned error code ${response.status}`)
+        }
+      }
+      return await response.json()
+    }
+
+    const { fromNetwork, toNetwork } = resolveNetworks(request)
+
+    const { fromCurrencyCode, toCurrencyCode } = getCodesWithTranscription(
+      request,
+      MAINNET_CODE_TRANSCRIPTION,
+      CURRENCY_CODE_TRANSCRIPTION
+    )
+
+    const [fromAddress, toAddress] = await Promise.all([
+      getAddress(fromWallet, addressTypeMap[fromWallet.currencyInfo.pluginId]),
+      getAddress(toWallet, addressTypeMap[toWallet.currencyInfo.pluginId])
+    ])
+
+    const amountWallet = reverse ? toWallet : fromWallet
+    const amountTokenId = reverse ? request.toTokenId : request.fromTokenId
+    const amount = nativeToDenomination(
+      amountWallet,
+      request.nativeAmount,
+      amountTokenId
+    )
+
+    const pairQuery: StringMap = {
+      tickerFrom: fromCurrencyCode.toLowerCase(),
+      networkFrom: fromNetwork,
+      tickerTo: toCurrencyCode.toLowerCase(),
+      networkTo: toNetwork,
+      fixed: String(fixed),
+      reverse: String(reverse)
+    }
+
+    const rangeJson = await call('GET', 'ranges', { query: pairQuery })
+    const { result: range } = asRangeReply(rangeJson)
+
+    // Native amounts are whole atomic units. Round a minimum up and a maximum
+    // down, so rounding never widens the range SimpleSwap actually accepts.
+    const limitDirection = reverse ? 'to' : 'from'
+    const nativeMin = ceil(
+      denominationToNative(amountWallet, range.min, amountTokenId),
+      0
+    )
+    if (lt(request.nativeAmount, nativeMin)) {
+      throw new SwapBelowLimitError(swapInfo, nativeMin, limitDirection)
+    }
+    if (range.max != null) {
+      const nativeMax = floor(
+        denominationToNative(amountWallet, range.max, amountTokenId),
+        0
+      )
+      if (gt(request.nativeAmount, nativeMax)) {
+        throw new SwapAboveLimitError(swapInfo, nativeMax, limitDirection)
+      }
+    }
+
+    const estimateJson = await call('GET', 'estimates', {
+      query: { ...pairQuery, amount }
+    })
+    const { result: estimate } = asEstimateReply(estimateJson)
+
+    const createJson = await call('POST', 'exchanges', {
+      body: {
+        tickerFrom: pairQuery.tickerFrom,
+        networkFrom: pairQuery.networkFrom,
+        tickerTo: pairQuery.tickerTo,
+        networkTo: pairQuery.networkTo,
+        amount,
+        fixed,
+        reverse,
+        addressTo: toAddress,
+        userRefundAddress: fromAddress,
+        rateId: estimate.rateId
+      }
+    })
+    // The order exists from here on, so EVERY failure below is fatal and
+    // `getQuote` must not retry the other flow: that would abandon this
+    // deposit and open a second live order. The boundary covers the response
+    // cleaner, the amount arithmetic and the spend construction alike, since a
+    // malformed amount makes biggystring throw an ordinary Error.
+    try {
+      const { result: exchange } = asCreatedExchangeReply(createJson)
+
+      const fromNativeAmount = floor(
+        denominationToNative(
+          fromWallet,
+          exchange.amountFrom,
+          request.fromTokenId
+        ),
+        0
+      )
+      const toNativeAmount = floor(
+        denominationToNative(toWallet, exchange.amountTo, request.toTokenId),
+        0
+      )
+
+      // Both amounts are echoed by SimpleSwap: `amountFrom` becomes the signed
+      // spend, `amountTo` is what the user is promised. The order was created
+      // from the locally pinned amount, so the echoed side must match it. Above
+      // it overspends; below it underpays a live order and the deposit never
+      // completes.
+      if (!reverse && !eq(fromNativeAmount, request.nativeAmount)) {
+        throw makeFatalError(
+          'SimpleSwap returned a source amount that does not match the requested amount'
+        )
+      }
+      if (reverse && lt(toNativeAmount, request.nativeAmount)) {
+        throw makeFatalError(
+          'SimpleSwap returned a destination amount below the requested amount'
+        )
+      }
+
+      const memos: EdgeMemo[] =
+        exchange.extraIdFrom == null || exchange.extraIdFrom === ''
+          ? []
+          : [
+              {
+                type: memoType(fromWallet.currencyInfo.pluginId),
+                value: exchange.extraIdFrom
+              }
+            ]
+
+      const spendInfo: EdgeSpendInfo = {
+        tokenId: request.fromTokenId,
+        spendTargets: [
+          {
+            nativeAmount: fromNativeAmount,
+            publicAddress: exchange.addressFrom
+          }
+        ],
+        memos,
+        networkFeeOption: 'high',
+        assetAction: {
+          assetActionType: 'swap'
+        },
+        savedAction: {
+          actionType: 'swap',
+          swapInfo,
+          orderId: exchange.id,
+          orderUri: orderUri + exchange.id,
+          isEstimate: !fixed,
+          toAsset: {
+            pluginId: toWallet.currencyInfo.pluginId,
+            tokenId: request.toTokenId,
+            nativeAmount: toNativeAmount
+          },
+          fromAsset: {
+            pluginId: fromWallet.currencyInfo.pluginId,
+            tokenId: request.fromTokenId,
+            nativeAmount: fromNativeAmount
+          },
+          payoutAddress: toAddress,
+          payoutWalletId: toWallet.id,
+          refundAddress: fromAddress
+        }
+      }
+
+      const expirationDate =
+        estimate.validUntil != null
+          ? ensureInFuture(new Date(estimate.validUntil))
+          : new Date(Date.now() + expirationMs)
+
+      return {
+        request,
+        spendInfo,
+        swapInfo,
+        fromNativeAmount,
+        expirationDate
+      }
+    } catch (error: unknown) {
+      throw error instanceof Error && error.name === FATAL_ERROR_NAME
+        ? error
+        : makeFatalError(
+            `SimpleSwap created an order this quote could not use: ${String(
+              error
+            )}`
+          )
+    }
+  }
+
+  // How actionable an error is for the user, highest first: a limit error names
+  // the amount to retry with, a permission error names an account problem, and
+  // "unsupported pair" is the least specific. A transport or server error ranks
+  // below all of them, so one flow's outage never masks the other's real answer.
+  // edge-core-js error classes are transpiled, so `instanceof SwapCurrencyError`
+  // is unreliable — match by name.
+  const errorRank = (error: unknown): number => {
+    if (!(error instanceof Error)) return 0
+    switch (error.name) {
+      case 'SwapBelowLimitError':
+      case 'SwapAboveLimitError':
+        return 3
+      case 'SwapPermissionError':
+        return 2
+      case 'SwapCurrencyError':
+        return 1
+      default:
+        return 0
+    }
+  }
+
+  const getQuote = async (
+    request: EdgeSwapRequestPlugin
+  ): Promise<SwapOrder> => {
+    // SimpleSwap rejects fixed-rate orders paying out to a memo/tag chain with
+    // a 500 that only the float flow gets past, so the retry is not limited to
+    // swap errors. Anything that fails BEFORE the order is created is safe to
+    // retry; once it exists every failure is fatal, so the retry can never
+    // abandon a live deposit and open a second one.
+    let fixedError: unknown
+    try {
+      return await getQuoteForFlow(request, true)
+    } catch (error: unknown) {
+      if (error instanceof Error && error.name === FATAL_ERROR_NAME) throw error
+      fixedError = error
+    }
+    try {
+      return await getQuoteForFlow(request, false)
+    } catch (error: unknown) {
+      throw errorRank(fixedError) >= errorRank(error) ? fixedError : error
+    }
+  }
+
+  // `getMaxSwappable` probe: build a SwapOrder locally, targeting the user's
+  // own from-chain address, so `getMaxSpendable` can estimate fees WITHOUT
+  // creating (and abandoning) a live SimpleSwap order. The trimmed amount is
+  // then run through the real `getQuote`, which creates exactly one order.
+  const fetchProbeOrder = async (
+    request: EdgeSwapRequestPlugin
+  ): Promise<SwapOrder> => {
+    resolveNetworks(request)
+    const fromAddress = await getAddress(
+      request.fromWallet,
+      addressTypeMap[request.fromWallet.currencyInfo.pluginId]
+    )
+    const spendInfo: EdgeSpendInfo = {
+      tokenId: request.fromTokenId,
+      spendTargets: [
+        {
+          nativeAmount: request.nativeAmount,
+          publicAddress: fromAddress
+        }
+      ],
+      networkFeeOption: 'high',
+      // Never broadcast; targeting the user's own address trips
+      // `SpendToSelfError` on engines whose public key is the address
+      // (every EVM chain). The real order below keeps all checks.
+      skipChecks: true,
+      assetAction: {
+        assetActionType: 'swap'
+      }
+    }
+    return {
+      request,
+      spendInfo,
+      swapInfo,
+      fromNativeAmount: request.nativeAmount,
+      expirationDate: new Date(Date.now() + expirationMs)
+    }
+  }
+
+  const out: EdgeSwapPlugin = {
+    swapInfo,
+
+    async fetchSwapQuote(req: EdgeSwapRequest): Promise<EdgeSwapQuote> {
+      const request = convertRequest(req)
+
+      checkInvalidTokenIds(INVALID_TOKEN_IDS, request, swapInfo)
+      checkWhitelistedMainnetCodes(
+        MAINNET_CODE_TRANSCRIPTION,
+        request,
+        swapInfo
+      )
+
+      const newRequest = await getMaxSwappable(fetchProbeOrder, request)
+      const swapOrder = await getQuote(newRequest)
+      return await makeSwapPluginQuote(swapOrder)
+    }
+  }
+
+  return out
+}
diff --git a/test/simpleswap.test.ts b/test/simpleswap.test.ts
new file mode 100644
index 00000000..895553eb
--- /dev/null
+++ b/test/simpleswap.test.ts
@@ -0,0 +1,680 @@
+// Run: mocha -r sucrase/register --extension ts test/simpleswap.test.ts
+import { assert } from 'chai'
+import { beforeEach, describe, it } from 'mocha'
+
+import { simpleswap } from '../src/mappings/simpleswap'
+import { makeSimpleSwapPlugin } from '../src/swap/central/simpleswap'
+import { edgeCurrencyPluginIds } from '../src/util/edgeCurrencyPluginIds'
+
+const BTC_MULTIPLIER = '100000000' // 1e8
+const ETH_MULTIPLIER = '1000000000000000000' // 1e18
+
+interface FakeReply {
+  status: number
+  body: unknown
+}
+type FetchHandler = (url: string, method: string) => FakeReply
+
+// Records the spendInfo the plugin hands to makeSpend so tests can inspect the
+// deposit address, memos and savedAction without running the on-chain approve.
+let capturedSpendInfo: any
+
+const makeWallet = (
+  pluginId: string,
+  currencyCode: string,
+  multiplier: string,
+  publicAddress: string,
+  id: string
+): any => ({
+  id,
+  currencyInfo: {
+    pluginId,
+    currencyCode,
+    denominations: [{ name: currencyCode, multiplier }]
+  },
+  // Edge's SwapCurrencyError reads currencyConfig.currencyInfo.pluginId
+  currencyConfig: { currencyInfo: { pluginId }, allTokens: {} },
+  balanceMap: new Map(),
+  getAddresses: async () => [{ addressType: 'publicAddress', publicAddress }],
+  makeSpend: async (spendInfo: any) => {
+    capturedSpendInfo = spendInfo
+    return {
+      savedAction: spendInfo.savedAction,
+      networkFee: '1000',
+      currencyCode,
+      txid: 'signed-txid'
+    }
+  }
+})
+
+const makeOpts = (handler: FetchHandler, apiKey = 'test-key'): any => ({
+  initOptions: { apiKey },
+  log: Object.assign(() => {}, { warn: () => {} }),
+  io: {
+    fetch: async (url: string, opts?: { method?: string }) => {
+      const method = opts?.method ?? 'GET'
+      const { status, body } = handler(url, method)
+      return {
+        ok: status >= 200 && status < 300,
+        status,
+        json: async () => body,
+        text: async () => JSON.stringify(body)
+      }
+    }
+  }
+})
+
+const okReplies = {
+  ranges: { result: { min: '0.001', max: '10' } },
+  estimates: {
+    result: {
+      estimatedAmount: '0.05',
+      rateId: 'rate-1',
+      validUntil: '2030-01-01T00:00:00.000Z'
+    }
+  },
+  exchanges: {
+    result: {
+      id: 'order-1',
+      addressFrom: 'deposit-addr',
+      amountFrom: '0.1',
+      amountTo: '0.05'
+    }
+  }
+}
+
+const routeOf = (url: string): 'ranges' | 'estimates' | 'exchanges' => {
+  if (url.includes('/ranges')) return 'ranges'
+  if (url.includes('/estimates')) return 'estimates'
+  return 'exchanges'
+}
+
+// Default handler: every hop succeeds.
+const happyHandler: FetchHandler = url => ({
+  status: 200,
+  body: okReplies[routeOf(url)]
+})
+
+const btcWallet = (): any =>
+  makeWallet('bitcoin', 'BTC', BTC_MULTIPLIER, 'btc-refund-addr', 'btc-wallet')
+const ethWallet = (): any =>
+  makeWallet('ethereum', 'ETH', ETH_MULTIPLIER, 'eth-payout-addr', 'eth-wallet')
+
+const fromRequest = (): any => ({
+  fromWallet: btcWallet(),
+  toWallet: ethWallet(),
+  fromTokenId: null,
+  toTokenId: null,
+  nativeAmount: '10000000', // 0.1 BTC
+  quoteFor: 'from'
+})
+
+// Assert on error.name rather than instanceof: mocha may load this test as ESM
+// while the plugin is required as CJS, giving edge-core-js two class identities.
+const expectError = async (
+  promise: Promise<unknown>,
+  expectedName: string
+): Promise<void> => {
+  try {
+    await promise
+    assert.fail(`Expected ${expectedName} to be thrown`)
+  } catch (error: any) {
+    const name = error?.name ?? error?.constructor?.name
+    assert.equal(name, expectedName)
+  }
+}
+
+describe('simpleswap mapping', function () {
+  it('maps majors to SimpleSwap network codes', function () {
+    assert.equal(simpleswap.get('bitcoin'), 'btc')
+    assert.equal(simpleswap.get('ethereum'), 'eth')
+    assert.equal(simpleswap.get('binancesmartchain'), 'bsc')
+    assert.equal(simpleswap.get('solana'), 'sol')
+    assert.equal(simpleswap.get('litecoin'), 'ltc')
+    assert.equal(simpleswap.get('tron'), 'trx')
+  })
+
+  it('maps unsupported chains and testnets to null (fail-loud, not mis-routed)', function () {
+    assert.isNull(simpleswap.get('rsk'))
+    assert.isNull(simpleswap.get('mayachain'))
+    assert.isNull(simpleswap.get('bitcointestnet'))
+    assert.isNull(simpleswap.get('sepolia'))
+  })
+
+  it('covers every EdgeCurrencyPluginId', function () {
+    const unmappedPluginIds = edgeCurrencyPluginIds.filter(
+      pluginId => !simpleswap.has(pluginId)
+    )
+    assert.deepEqual(unmappedPluginIds, [])
+  })
+})
+
+describe('makeSimpleSwapPlugin.fetchSwapQuote', function () {
+  beforeEach(function () {
+    capturedSpendInfo = undefined
+  })
+
+  it('quotes a fixed-rate "from" swap and builds the spend', async function () {
+    const plugin = makeSimpleSwapPlugin(makeOpts(happyHandler))
+    const quote = await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.equal(quote.pluginId, 'simpleswap')
+    assert.equal(quote.fromNativeAmount, '10000000') // 0.1 BTC
+    assert.equal(quote.toNativeAmount, '50000000000000000') // 0.05 ETH
+    assert.equal(quote.isEstimate, false) // fixed-rate is locked
+
+    const target = capturedSpendInfo.spendTargets[0]
+    assert.equal(target.publicAddress, 'deposit-addr')
+    assert.equal(target.nativeAmount, '10000000')
+
+    const action = capturedSpendInfo.savedAction
+    assert.equal(action.orderId, 'order-1')
+    assert.equal(action.payoutAddress, 'eth-payout-addr')
+    assert.equal(action.refundAddress, 'btc-refund-addr')
+    assert.equal(action.isEstimate, false)
+  })
+
+  it('quotes a reverse "to" swap', async function () {
+    const request = fromRequest()
+    request.quoteFor = 'to'
+    request.nativeAmount = '50000000000000000' // 0.05 ETH
+
+    const plugin = makeSimpleSwapPlugin(makeOpts(happyHandler))
+    const quote = await plugin.fetchSwapQuote(request, undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.equal(quote.fromNativeAmount, '10000000')
+    assert.equal(quote.toNativeAmount, '50000000000000000')
+  })
+
+  it('attaches a memo when the deposit address needs an extra id', async function () {
+    const handler: FetchHandler = url => {
+      if (routeOf(url) === 'exchanges') {
+        return {
+          status: 200,
+          body: {
+            result: {
+              id: 'order-2',
+              addressFrom: 'xrp-deposit',
+              extraIdFrom: 'tag-123',
+              amountFrom: '0.1',
+              amountTo: '0.05'
+            }
+          }
+        }
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.deepEqual(capturedSpendInfo.memos, [
+      { type: 'text', value: 'tag-123' }
+    ])
+  })
+
+  it('throws SwapBelowLimitError under the range minimum', async function () {
+    const handler: FetchHandler = url =>
+      routeOf(url) === 'ranges'
+        ? { status: 200, body: { result: { min: '1000', max: '10000' } } }
+        : { status: 200, body: okReplies[routeOf(url)] }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await expectError(
+      plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any),
+      'SwapBelowLimitError'
+    )
+  })
+
+  it('throws SwapAboveLimitError over the range maximum', async function () {
+    const handler: FetchHandler = url =>
+      routeOf(url) === 'ranges'
+        ? { status: 200, body: { result: { min: '0.0001', max: '0.01' } } }
+        : { status: 200, body: okReplies[routeOf(url)] }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await expectError(
+      plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any),
+      'SwapAboveLimitError'
+    )
+  })
+
+  it('falls back to floating when the pair is unavailable fixed', async function () {
+    const handler: FetchHandler = url => {
+      if (url.includes('fixed=true')) return { status: 404, body: {} }
+      if (routeOf(url) === 'estimates') {
+        // Floating estimate carries no rateId
+        return {
+          status: 200,
+          body: { result: { estimatedAmount: '0.05' } }
+        }
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    const quote = await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.equal(quote.isEstimate, true) // floating is an estimate
+    assert.equal(capturedSpendInfo.savedAction.isEstimate, true)
+  })
+
+  it('clamps a stale validUntil into the future', async function () {
+    const handler: FetchHandler = url => {
+      if (routeOf(url) === 'estimates') {
+        return {
+          status: 200,
+          body: {
+            result: {
+              estimatedAmount: '0.05',
+              rateId: 'rate-1',
+              validUntil: '2020-01-01T00:00:00.000Z' // already expired
+            }
+          }
+        }
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    const quote = await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.isDefined(quote.expirationDate)
+    assert.isAtLeast(
+      quote.expirationDate?.valueOf() ?? 0,
+      Date.now() + 25 * 1000
+    )
+  })
+
+  it('falls back to floating when the amount is below the fixed-rate minimum', async function () {
+    const handler: FetchHandler = url => {
+      if (routeOf(url) === 'ranges' && url.includes('fixed=true')) {
+        // Fixed-rate minimum above the requested 0.1 BTC
+        return { status: 200, body: { result: { min: '5', max: '10' } } }
+      }
+      if (routeOf(url) === 'estimates') {
+        return { status: 200, body: { result: { estimatedAmount: '0.05' } } }
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    const quote = await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.equal(quote.isEstimate, true) // served by the floating flow
+  })
+
+  it('surfaces the fixed-rate limit error when floating lacks the pair', async function () {
+    const handler: FetchHandler = url => {
+      if (routeOf(url) === 'ranges') {
+        if (url.includes('fixed=true')) {
+          return { status: 200, body: { result: { min: '5', max: '10' } } }
+        }
+        return { status: 404, body: {} }
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    try {
+      await plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any)
+      assert.fail('expected a limit error')
+    } catch (error: unknown) {
+      assert.equal((error as Error).name, 'SwapBelowLimitError')
+    }
+  })
+
+  it('maps a 403 to SwapPermissionError (unverified key)', async function () {
+    const handler: FetchHandler = () => ({ status: 403, body: {} })
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await expectError(
+      plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any),
+      'SwapPermissionError'
+    )
+  })
+
+  it('throws SwapCurrencyError for an unmapped chain before any request', async function () {
+    let fetched = false
+    const handler: FetchHandler = () => {
+      fetched = true
+      return { status: 200, body: {} }
+    }
+    const request = fromRequest()
+    request.fromWallet = makeWallet(
+      'rsk',
+      'RBTC',
+      ETH_MULTIPLIER,
+      'rsk-addr',
+      'rsk-wallet'
+    )
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await expectError(
+      plugin.fetchSwapQuote(request, undefined, { infoPayload: {} } as any),
+      'SwapCurrencyError'
+    )
+    assert.equal(fetched, false)
+  })
+
+  it('throws at factory time when apiKey is empty', function () {
+    assert.throws(
+      () => makeSimpleSwapPlugin(makeOpts(happyHandler, '')),
+      'missing apiKey'
+    )
+  })
+
+  it('creates exactly one order for a "max" quote (probe is quote-only)', async function () {
+    const exchangeCalls: string[] = []
+    const handler: FetchHandler = (url, method) => {
+      if (method === 'POST') exchangeCalls.push(url)
+      if (routeOf(url) === 'exchanges') {
+        return {
+          status: 200,
+          body: {
+            result: {
+              id: 'order-max',
+              addressFrom: 'deposit-addr',
+              amountFrom: '0.19', // the trimmed max the plugin sent
+              amountTo: '0.05'
+            }
+          }
+        }
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const request = fromRequest()
+    request.quoteFor = 'max'
+    request.fromWallet.balanceMap.set(null, '20000000') // 0.2 BTC on-chain
+    let probeSpendInfo: any
+    request.fromWallet.getMaxSpendable = async (
+      spendInfo: any
+    ): Promise<string> => {
+      probeSpendInfo = spendInfo
+      return '19000000' // balance minus fees
+    }
+
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    const quote = await plugin.fetchSwapQuote(request, undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.equal(quote.fromNativeAmount, '19000000') // the trimmed max
+    assert.equal(exchangeCalls.length, 1)
+    // The probe targets the user's own address and is never broadcast;
+    // without skipChecks EVM engines reject it with SpendToSelfError.
+    assert.equal(probeSpendInfo.skipChecks, true)
+  })
+
+  it('falls back to floating when the fixed flow fails on a server error', async function () {
+    // SimpleSwap rejects a fixed-rate order paying out to a memo/tag chain
+    // with `500 check extra_id`; only the floating flow gets past it.
+    const handler: FetchHandler = url => {
+      if (url.includes('fixed=true') && routeOf(url) !== 'ranges') {
+        return { status: 500, body: { message: 'check extra_id' } }
+      }
+      if (routeOf(url) === 'estimates') {
+        return { status: 200, body: { result: { estimatedAmount: '0.05' } } }
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    const quote = await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.equal(quote.isEstimate, true) // served by the floating flow
+  })
+
+  it('surfaces the fixed flow SwapCurrencyError over a floating server error', async function () {
+    const handler: FetchHandler = url => {
+      if (routeOf(url) === 'ranges') {
+        return url.includes('fixed=true')
+          ? { status: 404, body: {} } // pair unavailable fixed
+          : { status: 500, body: {} } // floating side is just broken
+      }
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await expectError(
+      plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any),
+      'SwapCurrencyError'
+    )
+  })
+
+  it('rounds provider amounts to whole atomic units', async function () {
+    const handler: FetchHandler = url =>
+      routeOf(url) === 'exchanges'
+        ? {
+            status: 200,
+            body: {
+              result: {
+                id: 'order-3',
+                addressFrom: 'deposit-addr',
+                amountFrom: '0.1',
+                // More decimals than ETH's denomination holds
+                amountTo: '0.0500000000000000005'
+              }
+            }
+          }
+        : { status: 200, body: okReplies[routeOf(url)] }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    const quote = await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+
+    assert.equal(quote.toNativeAmount, '50000000000000000')
+  })
+
+  it('rounds a range minimum up, never below what SimpleSwap accepts', async function () {
+    const handler: FetchHandler = url =>
+      routeOf(url) === 'ranges'
+        ? {
+            status: 200,
+            // 0.100000001 BTC = 10000000.1 native, just above the request
+            body: { result: { min: '0.100000001', max: '10' } }
+          }
+        : { status: 200, body: okReplies[routeOf(url)] }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    try {
+      await plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any)
+      assert.fail('expected SwapBelowLimitError')
+    } catch (error: unknown) {
+      assert.equal((error as Error).name, 'SwapBelowLimitError')
+      assert.equal((error as any).nativeMin, '10000001')
+    }
+  })
+
+  it('rejects a source amount above the requested amount', async function () {
+    const exchangeCalls: string[] = []
+    const handler: FetchHandler = (url, method) => {
+      if (method === 'POST') exchangeCalls.push(url)
+      return routeOf(url) === 'exchanges'
+        ? {
+            status: 200,
+            body: {
+              result: {
+                id: 'order-4',
+                addressFrom: 'deposit-addr',
+                amountFrom: '0.2', // double what the request pinned
+                amountTo: '0.05'
+              }
+            }
+          }
+        : { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    try {
+      await plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any)
+      assert.fail('expected the source amount to be rejected')
+    } catch (error: unknown) {
+      assert.include(
+        (error as Error).message,
+        'source amount that does not match the requested amount'
+      )
+    }
+    // The fixed order already exists, so the float flow must not run and
+    // abandon it for a second one.
+    assert.equal(exchangeCalls.length, 1)
+  })
+
+  it('keeps a numeric deposit tag, including tag 0', async function () {
+    const makeHandler = (extraIdFrom: unknown): FetchHandler => url =>
+      routeOf(url) === 'exchanges'
+        ? {
+            status: 200,
+            body: {
+              result: {
+                id: 'order-5',
+                addressFrom: 'xrp-deposit',
+                extraIdFrom,
+                amountFrom: '0.1',
+                amountTo: '0.05'
+              }
+            }
+          }
+        : { status: 200, body: okReplies[routeOf(url)] }
+
+    // SimpleSwap sends the tag as a JSON number on some chains
+    let plugin = makeSimpleSwapPlugin(makeOpts(makeHandler(668522715)))
+    await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+    assert.deepEqual(capturedSpendInfo.memos, [
+      { type: 'text', value: '668522715' }
+    ])
+
+    // Tag 0 is a real tag, not an absent one
+    plugin = makeSimpleSwapPlugin(makeOpts(makeHandler(0)))
+    await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+    assert.deepEqual(capturedSpendInfo.memos, [{ type: 'text', value: '0' }])
+
+    // An empty tag is absent, not an empty memo
+    plugin = makeSimpleSwapPlugin(makeOpts(makeHandler('')))
+    await plugin.fetchSwapQuote(fromRequest(), undefined, {
+      infoPayload: {}
+    } as any)
+    assert.deepEqual(capturedSpendInfo.memos, [])
+  })
+
+  it('never opens a second order when the created one cannot be read', async function () {
+    const exchangeCalls: string[] = []
+    const handler: FetchHandler = (url, method) => {
+      if (method === 'POST') exchangeCalls.push(url)
+      return routeOf(url) === 'exchanges'
+        ? { status: 200, body: { result: { id: 'order-6' } } } // missing fields
+        : { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await expectError(
+      plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any),
+      'SimpleSwapFatalError'
+    )
+    assert.equal(exchangeCalls.length, 1)
+  })
+
+  it('never opens a second order when a created amount is unparseable', async function () {
+    const exchangeCalls: string[] = []
+    const handler: FetchHandler = (url, method) => {
+      if (method === 'POST') exchangeCalls.push(url)
+      return routeOf(url) === 'exchanges'
+        ? {
+            status: 200,
+            body: {
+              result: {
+                id: 'order-8',
+                addressFrom: 'deposit-addr',
+                amountFrom: 'not-a-number', // passes asNumberString, breaks biggystring
+                amountTo: '0.05'
+              }
+            }
+          }
+        : { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await expectError(
+      plugin.fetchSwapQuote(fromRequest(), undefined, {
+        infoPayload: {}
+      } as any),
+      'SimpleSwapFatalError'
+    )
+    assert.equal(exchangeCalls.length, 1)
+  })
+
+  it('rejects a destination amount below the requested amount on a reverse quote', async function () {
+    const request = fromRequest()
+    request.quoteFor = 'to'
+    request.nativeAmount = '50000000000000000' // 0.05 ETH pinned by the user
+    const handler: FetchHandler = url =>
+      routeOf(url) === 'exchanges'
+        ? {
+            status: 200,
+            body: {
+              result: {
+                id: 'order-7',
+                addressFrom: 'deposit-addr',
+                amountFrom: '0.1',
+                amountTo: '0.04' // under-delivers the pinned receive amount
+              }
+            }
+          }
+        : { status: 200, body: okReplies[routeOf(url)] }
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    try {
+      await plugin.fetchSwapQuote(request, undefined, {
+        infoPayload: {}
+      } as any)
+      assert.fail('expected the destination amount to be rejected')
+    } catch (error: unknown) {
+      assert.include(
+        (error as Error).message,
+        'destination amount below the requested amount'
+      )
+    }
+  })
+
+  it('transcribes Edge currency codes to SimpleSwap tickers (BNB -> bnb-bsc)', async function () {
+    const requestedUrls: string[] = []
+    const handler: FetchHandler = url => {
+      requestedUrls.push(url)
+      return { status: 200, body: okReplies[routeOf(url)] }
+    }
+    const request = fromRequest()
+    request.fromWallet = makeWallet(
+      'binancesmartchain',
+      'BNB',
+      ETH_MULTIPLIER,
+      'bsc-refund-addr',
+      'bsc-wallet'
+    )
+    request.nativeAmount = '100000000000000000' // 0.1 BNB
+    const plugin = makeSimpleSwapPlugin(makeOpts(handler))
+    await plugin.fetchSwapQuote(request, undefined, { infoPayload: {} } as any)
+
+    const rangesUrl = requestedUrls.find(url => url.includes('/ranges'))
+    assert.include(rangesUrl, 'tickerFrom=bnb-bsc')
+    assert.include(rangesUrl, 'networkFrom=bsc')
+    assert.include(rangesUrl, 'tickerTo=eth')
+  })
+})