diff --git a/packages/asset-swapper/package.json b/packages/asset-swapper/package.json
index b3de791fc3..bce6d04b7f 100644
--- a/packages/asset-swapper/package.json
+++ b/packages/asset-swapper/package.json
@@ -71,6 +71,10 @@
         "@0x/web3-wrapper": "^7.2.0",
         "@balancer-labs/sor": "0.3.2",
         "@bancor/sdk": "^0.2.9",
+        "@ethersproject/abi": "^5.0.1",
+        "@ethersproject/address": "^5.0.1",
+        "@ethersproject/contracts": "^5.0.1",
+        "@ethersproject/providers": "^5.0.4",
         "axios": "^0.19.2",
         "axios-mock-adapter": "^1.18.1",
         "cream-sor": "^0.3.3",
diff --git a/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts b/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts
index db00313a40..bb37e24a60 100644
--- a/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts
+++ b/packages/asset-swapper/src/utils/market_operation_utils/sampler_operations.ts
@@ -508,7 +508,7 @@ export class SamplerOperations {
         const pools = await this.creamPoolsCache.getPoolsForPairAsync(takerToken, makerToken);
         return pools.map(pool =>
             takerFillAmounts.map(amount => ({
-                source: ERC20BridgeSource.Balancer,
+                source: ERC20BridgeSource.Cream,
                 output: computeBalancerSellQuote(pool, amount),
                 input: amount,
                 fillData: { poolAddress: pool.id },
@@ -524,7 +524,7 @@ export class SamplerOperations {
         const pools = await this.creamPoolsCache.getPoolsForPairAsync(takerToken, makerToken);
         return pools.map(pool =>
             makerFillAmounts.map(amount => ({
-                source: ERC20BridgeSource.Balancer,
+                source: ERC20BridgeSource.Cream,
                 output: computeBalancerBuyQuote(pool, amount),
                 input: amount,
                 fillData: { poolAddress: pool.id },
diff --git a/yarn.lock b/yarn.lock
index 7c3a875798..c98c05e5d2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1093,6 +1093,242 @@
   version "0.7.2"
   resolved "https://registry.yarnpkg.com/@emotion/unitless/-/unitless-0.7.2.tgz#b180097bb44a40c3b59efea9cf28df2fe542d518"
 
+"@ethersproject/abi@^5.0.1", "@ethersproject/abi@^5.0.5":
+  version "5.0.7"
+  resolved "https://registry.yarnpkg.com/@ethersproject/abi/-/abi-5.0.7.tgz#79e52452bd3ca2956d0e1c964207a58ad1a0ee7b"
+  integrity sha512-Cqktk+hSIckwP/W8O47Eef60VwmoSC/L3lY0+dIBhQPCNn9E4V7rwmm2aFrNRRDJfFlGuZ1khkQUOc3oBX+niw==
+  dependencies:
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/hash" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+
+"@ethersproject/abstract-provider@^5.0.4":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/abstract-provider/-/abstract-provider-5.0.5.tgz#797a32a8707830af1ad8f833e9c228994d5572b9"
+  integrity sha512-i/CjElAkzV7vQBAeoz+IpjGfcFYEP9eD7j3fzZ0fzTq03DO7PPnR+xkEZ1IoDXGwDS+55aLM1xvLDwB/Lx6IOQ==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/networks" "^5.0.3"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/transactions" "^5.0.5"
+    "@ethersproject/web" "^5.0.6"
+
+"@ethersproject/abstract-signer@^5.0.4":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/abstract-signer/-/abstract-signer-5.0.6.tgz#c01211665ab9c9e93988c4783b789712fd93a388"
+  integrity sha512-h8TZBX3pL2Xx9tmsRxfWcaaI+FcJFHWvZ/vNvFjLp8zJ0kPD501LKTt2jo44LZ20N3EW68JMoyEmRQ6bpsn+iA==
+  dependencies:
+    "@ethersproject/abstract-provider" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+
+"@ethersproject/address@^5.0.1", "@ethersproject/address@^5.0.4":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/address/-/address-5.0.5.tgz#2caa65f6b7125015395b1b54c985ee0b27059cc7"
+  integrity sha512-DpkQ6rwk9jTefrRsJzEm6nhRiJd9pvhn1xN0rw5N/jswXG5r7BLk/GVA0mMAVWAsYfvi2xSc5L41FMox43RYEA==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/rlp" "^5.0.3"
+    bn.js "^4.4.0"
+
+"@ethersproject/base64@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/base64/-/base64-5.0.4.tgz#b0d8fdbf3dda977cf546dcd35725a7b1d5256caa"
+  integrity sha512-4KRykQ7BQMeOXfvio1YITwHjxwBzh92UoXIdzxDE1p53CK28bbHPdsPNYo0wl0El7lJAMpT2SOdL0hhbWRnyIA==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+
+"@ethersproject/basex@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/basex/-/basex-5.0.4.tgz#93e1cd11f9a47281da2389de24f88e13e9d90847"
+  integrity sha512-ixIr/kKiAoSzOnSc777AGIOAhKai5Ivqr4HO/Gz+YG+xkfv6kqD6AW4ga9vM20Wwb0QBhh3LoRWTu4V1K+x9Ew==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/properties" "^5.0.3"
+
+"@ethersproject/bignumber@^5.0.7":
+  version "5.0.8"
+  resolved "https://registry.yarnpkg.com/@ethersproject/bignumber/-/bignumber-5.0.8.tgz#cee33bd8eb0266176def0d371b45274b1d2c4ec0"
+  integrity sha512-KXFVAFKS1jdTXYN8BE5Oj+ZfPMh28iRdFeNGBVT6cUFdtiPVqeXqc0ggvBqA3A1VoFFGgM7oAeaagA393aORHA==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    bn.js "^4.4.0"
+
+"@ethersproject/bytes@^5.0.4":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/bytes/-/bytes-5.0.5.tgz#688b70000e550de0c97a151a21f15b87d7f97d7c"
+  integrity sha512-IEj9HpZB+ACS6cZ+QQMTqmu/cnUK2fYNE6ms/PVxjoBjoxc6HCraLpam1KuRvreMy0i523PLmjN8OYeikRdcUQ==
+  dependencies:
+    "@ethersproject/logger" "^5.0.5"
+
+"@ethersproject/constants@^5.0.4":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/constants/-/constants-5.0.5.tgz#0ed19b002e8404bdf6d135234dc86a7d9bcf9b71"
+  integrity sha512-foaQVmxp2+ik9FrLUCtVrLZCj4M3Ibgkqvh+Xw/vFRSerkjVSYePApaVE5essxhoSlF1U9oXfWY09QI2AXtgKA==
+  dependencies:
+    "@ethersproject/bignumber" "^5.0.7"
+
+"@ethersproject/contracts@^5.0.1":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/contracts/-/contracts-5.0.5.tgz#64831a341ec8ca225e83ff3e9437c26b970fd5d7"
+  integrity sha512-tFI255lFbmbqMkgnuyhDWHl3yWqttPlReplYuVvDCT/SuvBjLR4ad2uipBlh1fh5X1ipK9ettAoV4S0HKim4Kw==
+  dependencies:
+    "@ethersproject/abi" "^5.0.5"
+    "@ethersproject/abstract-provider" "^5.0.4"
+    "@ethersproject/abstract-signer" "^5.0.4"
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+
+"@ethersproject/hash@^5.0.4":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/hash/-/hash-5.0.5.tgz#e383ba2c7941834266fa6e2cf543d2b0c50a9d59"
+  integrity sha512-GpI80/h2HDpfNKpCZoxQJCjOQloGnlD5hM1G+tZe8FQDJhEvFjJoPDuWv+NaYjJfOciKS2Axqc4Q4WamdLoUgg==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/strings" "^5.0.4"
+
+"@ethersproject/keccak256@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/keccak256/-/keccak256-5.0.4.tgz#36ca0a7d1ae2a272da5654cb886776d0c680ef3a"
+  integrity sha512-GNpiOUm9PGUxFNqOxYKDQBM0u68bG9XC9iOulEQ8I0tOx/4qUpgVzvgXL6ugxr0RY554Gz/NQsVqknqPzUcxpQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    js-sha3 "0.5.7"
+
+"@ethersproject/logger@^5.0.5":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/logger/-/logger-5.0.6.tgz#faa484203e86e08be9e07fef826afeef7183fe88"
+  integrity sha512-FrX0Vnb3JZ1md/7GIZfmJ06XOAA8r3q9Uqt9O5orr4ZiksnbpXKlyDzQtlZ5Yv18RS8CAUbiKH9vwidJg1BPmQ==
+
+"@ethersproject/networks@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/networks/-/networks-5.0.4.tgz#6d320a5e15a0cda804f5da88be0ba846156f6eec"
+  integrity sha512-/wHDTRms5mpJ09BoDrbNdFWINzONe05wZRgohCXvEv39rrH/Gd/yAnct8wC0RsW3tmFOgjgQxuBvypIxuUynTw==
+  dependencies:
+    "@ethersproject/logger" "^5.0.5"
+
+"@ethersproject/properties@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/properties/-/properties-5.0.4.tgz#a67a1f5a52c30850b5062c861631e73d131f666e"
+  integrity sha512-UdyX3GqBxFt15B0uSESdDNmhvEbK3ACdDXl2soshoPcneXuTswHDeA0LoPlnaZzhbgk4p6jqb4GMms5C26Qu6A==
+  dependencies:
+    "@ethersproject/logger" "^5.0.5"
+
+"@ethersproject/providers@^5.0.4":
+  version "5.0.12"
+  resolved "https://registry.yarnpkg.com/@ethersproject/providers/-/providers-5.0.12.tgz#de05e865e130709ea1e0870511eb892bda7d41cb"
+  integrity sha512-bRUEVNth+wGlm2Q0cQprVlixBWumfP9anrgAc3V2CbIh+GKvCwisVO8uRLrZOfOvTNSy6PUJi/Z4D5L+k3NAog==
+  dependencies:
+    "@ethersproject/abstract-provider" "^5.0.4"
+    "@ethersproject/abstract-signer" "^5.0.4"
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/basex" "^5.0.3"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/hash" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/networks" "^5.0.3"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/random" "^5.0.3"
+    "@ethersproject/rlp" "^5.0.3"
+    "@ethersproject/sha2" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+    "@ethersproject/transactions" "^5.0.5"
+    "@ethersproject/web" "^5.0.6"
+    bech32 "1.1.4"
+    ws "7.2.3"
+
+"@ethersproject/random@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/random/-/random-5.0.4.tgz#98f7cf65b0e588cec39ef24843e391ed5004556f"
+  integrity sha512-AIZJhqs6Ba4/+U3lOjt3QZbP6b/kuuGLJUYFUonAgWmkTHwqsCwYnFvnHKQSUuHbXHvErp7WFXFlztx+yMn3kQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+
+"@ethersproject/rlp@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/rlp/-/rlp-5.0.4.tgz#0090a0271e84ea803016a112a79f5cfd80271a77"
+  integrity sha512-5qrrZad7VTjofxSsm7Zg/7Dr4ZOln4S2CqiDdOuTv6MBKnXj0CiBojXyuDy52M8O3wxH0CyE924hXWTDV1PQWQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+
+"@ethersproject/sha2@^5.0.3":
+  version "5.0.4"
+  resolved "https://registry.yarnpkg.com/@ethersproject/sha2/-/sha2-5.0.4.tgz#40f639721a27dbe034b3dee021ba20b054586fec"
+  integrity sha512-0yFhf1mspxAfWdXXoPtK94adUeu1R7/FzAa+DfEiZTc76sz/vHXf0LSIazoR3znYKFny6haBxME+usbvvEcF3A==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    hash.js "1.1.3"
+
+"@ethersproject/signing-key@^5.0.4":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/signing-key/-/signing-key-5.0.5.tgz#acfd06fc05a14180df7e027688bbd23fc4baf782"
+  integrity sha512-Z1wY7JC1HVO4CvQWY2TyTTuAr8xK3bJijZw1a9G92JEmKdv1j255R/0YLBBcFTl2J65LUjtXynNJ2GbArPGi5g==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    elliptic "6.5.3"
+
+"@ethersproject/strings@^5.0.4":
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/@ethersproject/strings/-/strings-5.0.5.tgz#ed7e99a282a02f40757691b04a24cd83f3752195"
+  integrity sha512-JED6WaIV00xM/gvj8vSnd+0VWtDYdidTmavFRCTQakqfz+4tDo6Jz5LHgG+dd45h7ah7ykCHW0C7ZXWEDROCXQ==
+  dependencies:
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+
+"@ethersproject/transactions@^5.0.5":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@ethersproject/transactions/-/transactions-5.0.6.tgz#b8b27938be6e9ed671dbdd35fe98af8b14d0df7c"
+  integrity sha512-htsFhOD+NMBxx676A8ehSuwVV49iqpSB+CkjPZ02tpNew0K6p8g0CZ46Z1ZP946gIHAU80xQ0NACHYrjIUaCFA==
+  dependencies:
+    "@ethersproject/address" "^5.0.4"
+    "@ethersproject/bignumber" "^5.0.7"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/constants" "^5.0.4"
+    "@ethersproject/keccak256" "^5.0.3"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/rlp" "^5.0.3"
+    "@ethersproject/signing-key" "^5.0.4"
+
+"@ethersproject/web@^5.0.6":
+  version "5.0.9"
+  resolved "https://registry.yarnpkg.com/@ethersproject/web/-/web-5.0.9.tgz#b08f8295f4bfd4777c8723fe9572f5453b9f03cb"
+  integrity sha512-//QNlv1MSkOII1hv3+HQwWoiVFS+BMVGI0KYeUww4cyrEktnx1QIez5bTSab9s9fWTFaWKNmQNBwMbxAqPuYDw==
+  dependencies:
+    "@ethersproject/base64" "^5.0.3"
+    "@ethersproject/bytes" "^5.0.4"
+    "@ethersproject/logger" "^5.0.5"
+    "@ethersproject/properties" "^5.0.3"
+    "@ethersproject/strings" "^5.0.4"
+
 "@evocateur/libnpmaccess@^3.1.2":
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/@evocateur/libnpmaccess/-/libnpmaccess-3.1.2.tgz#ecf7f6ce6b004e9f942b098d92200be4a4b1c845"
@@ -3911,6 +4147,11 @@ bcrypt-pbkdf@^1.0.0:
   dependencies:
     tweetnacl "^0.14.3"
 
+bech32@1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/bech32/-/bech32-1.1.4.tgz#e38c9f37bf179b8eb16ae3a772b40c356d4832e9"
+  integrity sha512-s0IrSOzLlbvX7yp4WBfPITzpAU8sqQcpsmwXDiKwrG4r491vwCO/XpejasRNl0piBMe/DvP4Tz0mIS/X1DPJBQ==
+
 before-after-hook@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/before-after-hook/-/before-after-hook-2.1.0.tgz#b6c03487f44e24200dd30ca5e6a1979c5d2fb635"
@@ -6364,6 +6605,19 @@ elliptic@6.5.2:
     minimalistic-assert "^1.0.0"
     minimalistic-crypto-utils "^1.0.0"
 
+elliptic@6.5.3:
+  version "6.5.3"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
+  integrity sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==
+  dependencies:
+    bn.js "^4.4.0"
+    brorand "^1.0.1"
+    hash.js "^1.0.0"
+    hmac-drbg "^1.0.0"
+    inherits "^2.0.1"
+    minimalistic-assert "^1.0.0"
+    minimalistic-crypto-utils "^1.0.0"
+
 elliptic@^6.0.0, elliptic@^6.2.3, elliptic@^6.4.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.4.0.tgz#cac9af8762c85836187003c8dfe193e5e2eae5df"
@@ -18449,6 +18703,11 @@ write@^0.2.1:
   dependencies:
     mkdirp "^0.5.1"
 
+ws@7.2.3:
+  version "7.2.3"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.2.3.tgz#a5411e1fb04d5ed0efee76d26d5c46d830c39b46"
+  integrity sha512-HTDl9G9hbkNDk98naoR/cHDws7+EyYMOdL1BmjsZXRUjf7d+MficC4B7HLUPlSiho0vg+CWKrGIt/VJBd1xunQ==
+
 ws@^3.0.0:
   version "3.3.3"
   resolved "https://registry.yarnpkg.com/ws/-/ws-3.3.3.tgz#f1cf84fe2d5e901ebce94efaece785f187a228f2"