Proposal to upgrade the exchange rate canister

Repository: https://github.com/dfinity/exchange-rate-canister.git

Git hash: 99b3c5be32a99e79006032321d46236c9400e107

New compressed Wasm hash: 712b424f1346e94373b5fbede822fa7d7a3a8580f13916513d77b3ca6ca71d3a

Upgrade args hash: 0fee102bd16b053022b69f2c65fd5e2f41d150ce9c214ac8731cfaf496ebda4e

Target canister: uf6dk-hyaaa-aaaaq-qaaaq-cai

Previous exchange rate proposal: https://dashboard.internetcomputer.org/proposal/142133

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Motivation

• Discover trading pairs dynamically across exchanges, in preparation for only querying rates from exchanges where the pair is traded.
• Query KuCoin over a closed-minute window to avoid errors for the still-forming minute.

Release Notes

git log --format='%C(auto) %h %s' d34c21acb582afb872c93b14559e23ea9fb07c7a..99b3c5be32a99e79006032321d46236c9400e107 --
99b3c5b fix: release the XRC-call guard when entry encoding fails (#335)
b609418 feat: DEFI-2868: discover listings periodically - store, refresh, metrics (#332)
8145b19 feat: DEFI-2868: add per-exchange listing parsers for USDT pair discovery (#330)
75c3ec9 fix: DEFI-2866: query KuCoin over a closed-minute window (#326)
ff74e66 chore: Proposal to upgrade the XRC to release 2026.06.05 (#325)

Upgrade args

git fetch
git checkout 99b3c5be32a99e79006032321d46236c9400e107
didc encode '()' | xxd -r -p | sha256sum

Wasm Verification

Verify that the hash of the gzipped WASM matches the proposed hash.

git fetch
git checkout 99b3c5be32a99e79006032321d46236c9400e107
IP_SUPPORT="ipv4" "./scripts/docker-build"
sha256sum ./xrc.wasm.gz

Original NNS proposal

Proposal to execute nervous system function:

Nervous system function:

NervousSystemFunction { id: 1000, name: "Vote on NNS proposal", description: Some( "Vote yes to a given NNS proposal. If there is no strict majority, vote for the majority outcome.", ), function_type: Some( GenericNervousSystemFunction( GenericNervousSystemFunction { target_canister_id: Some( tsbvt-pyaaa-aaaar-qafva-cai, ), target_method_name: Some( "approve_proposal", ), validator_canister_id: Some( tsbvt-pyaaa-aaaar-qafva-cai, ), validator_method_name: Some( "approve_proposal_validate", ), topic: Some( ApplicationBusinessLogic, ), }, ), ), }

Payload sha256:

42395e82fa36ba3d7791341a3538ccb51ec4116f939a83ff4ed12ce05277c175

Payload:

142255